Não informado. (1931). Veterinary bulletin. Commonwealth Bureau of Animal Health, Weybridge.
Lua i Stíl Chicago (17ú heag.)Não informado. Veterinary Bulletin. Farnham Royal, Inglaterra: Commonwealth Bureau of Animal Health, Weybridge, 1931.
Lua MLA (8ú heag.)Não informado. Veterinary Bulletin. Commonwealth Bureau of Animal Health, Weybridge, 1931.
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