Biological survey of Conrad Island, N.S. : [manuscript and other materials]
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Biological survey of Conrad Island, N.S. : [manuscript and other materials]
Birds and mammals of Alexandra Fiord and vicinity : [manuscript and other materials]
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Birds and mammals of Alexandra Fiord and vicinity : [manuscript and other materials]
Breeding bird communities in a hardwood forest succession in Nova Scotia : [manuscript and other materials]
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Breeding bird communities in a hardwood forest succession in Nova Scotia : [manuscript and other materials]
Breeding bird surveys at Alexandra Fiord, Ellesmere Island, Nunavut, 1980-2008 : [manuscript]
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Breeding bird surveys at Alexandra Fiord, Ellesmere Island, Nunavut, 1980-2008 : [manuscript]
Controversy over the use of herbicides in forestry, with particular reference to glyphosate usage : [manuscript and correspondence]
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Controversy over the use of herbicides in forestry, with particular reference to glyphosate usage : [manuscript and correspondence]
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Correspondence related to the lending and valuation of the Labrador duck specimen held in the collection of the McCulloch Museum, Dalhousie University : [correspondence]
Ecology of a high Arctic lowland oasis, Alexandra Fjord (78 53'N, 75 65'W), Ellesmere Island, N.W.T., Canada : 1980 and 1981 progress reports : [manuscript]
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Ecology of a high Arctic lowland oasis, Alexandra Fjord (78 53'N, 75 65'W), Ellesmere Island, N.W.T., Canada : 1980 and 1981 progress reports : [manuscript]
Effects of silvicultural use of the herbicide glyphosate on breeding birds of regenerating clearcuts in Nova Scotia, Canada : [manuscript and other materials]
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Effects of silvicultural use of the herbicide glyphosate on breeding birds of regenerating clearcuts in Nova Scotia, Canada : [manuscript and other materials]
Effects of the herbicide 2,4,5-T on the habitat and abundance of breeding birds and small mammals of a conifer clearcut in Nova Scotia : [manuscript and correspondence]
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Effects of the herbicide 2,4,5-T on the habitat and abundance of breeding birds and small mammals of a conifer clearcut in Nova Scotia : [manuscript and correspondence]
Foraging behavior and prey selection by ospreys in coastal habitats in Nova Scotia, Canada : [manuscript]
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Foraging behavior and prey selection by ospreys in coastal habitats in Nova Scotia, Canada : [manuscript]
Forestry management practices and populations of breeding birds in a hardwood forest in Nova Scotia : [manuscript and correspondence]
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Forestry management practices and populations of breeding birds in a hardwood forest in Nova Scotia : [manuscript and correspondence]
Inventory of ecological values on McNab's Island, Halifax County : [draft manuscript]
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Inventory of ecological values on McNab's Island, Halifax County : [draft manuscript]
McNab's Island Christmas bird counts
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McNab's Island Christmas bird counts
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Photograph of a bird near melting lake ice in the Tobeatic Wilderness Area, southwestern Nova Scotia
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Photograph of a Double-crested cormorant colony at Little Galloo Island, Lake Ontario
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Photograph of a Double-crested cormorant embryo from an addled egg at Lake WInnipegosis, western Manitoba
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Photograph of a gannet colony on a rocky outcrop, Cape St. Mary's, Newfoundland and Labrador
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Photograph of a Jim Ludwig's pet Double-crested cormorant named Crossbill in Green Bay, Wisconsin
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island
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Photograph of a nesting Arctic tern at Alexandra Fiord, Ellesmere Island