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Archival DescriptionWilliam Threlfall fonds
William Threlfall fonds
Ectoparasites / Wheeler and Threlfall
Ectoparasites / Wheeler and Threlfall
Studies on the helminth parasites of herring gulls (Larus argentatus Pontopp.) on the Newborough Warren Nature Reserve, Anglesey / by William Threlfall
Studies on the helminth parasites of herring gulls (Larus argentatus Pontopp.) on the Newborough Warren Nature Reserve, Anglesey / by William Threlfall
Collected reprints, volumes I & II / William Threlfall
Collected reprints, volumes I & II / William Threlfall