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Archival DescriptionPhotographs of the effects of pollution of Double-crested cormorant in the Great Lakes and Lake Winnipegosis
Photographs of the effects of pollution of Double-crested cormorant in the Great Lakes and Lake Winnipegosis
Photographs of forest and flora near Thompson, Manitoba
Photographs of forest and flora near Thompson, Manitoba
Photographs of copper-zinc and sulfur dioxide devegetation
Photographs of copper-zinc and sulfur dioxide devegetation