(1989). Proceedings of the 40th North Central Avian Disease Conference and Poultry Respiratory Disease Symposium, 1989. [Minneapolis, MN?]: College of Veterinary Medicine, Minnesota Extension Service, University of Minnesota.
Παραπομπή Chicago StyleProceedings of the 40th North Central Avian Disease Conference and Poultry Respiratory Disease Symposium, 1989. [Minneapolis, MN?]: College of Veterinary Medicine, Minnesota Extension Service, University of Minnesota, 1989.
Παραπομπή MLAProceedings of the 40th North Central Avian Disease Conference and Poultry Respiratory Disease Symposium, 1989. [Minneapolis, MN?]: College of Veterinary Medicine, Minnesota Extension Service, University of Minnesota, 1989.
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