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WILLIAM THRELFALL "Diseases and Pathological Conditions of the Herring Gull (Larus argentatus Pontopp.) Excluding Helminth Infestations," Bulletin of the Wildlife Disease Association 3(2), 62-67, (1 April 1967). https://doi.org/10.7589/0090-3558-3.2.62
WILLIAM THRELFALL "Diseases and Pathological Conditions of the Herring Gull (Larus argentatus Pontopp.) Excluding Helminth Infestations," Bulletin of the Wildlife Disease Association, 3(2), 62-67, (1 April 1967)
