Não informado. (1978). Veterinary surgery. American College of Veterinary Surgeons.
Lua i Stíl Chicago (17ú heag.)Não informado. Veterinary Surgery. Philadelphia, Pa: American College of Veterinary Surgeons, 1978.
Lua MLA (8ú heag.)Não informado. Veterinary Surgery. American College of Veterinary Surgeons, 1978.
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