Não informado. (2001). Swine Health and Production. American Association of Swine Practitioners.
Lua i Stíl Chicago (17ú heag.)Não informado. Swine Health and Production. Bloomington, Ind: American Association of Swine Practitioners, 2001.
Lua MLA (8ú heag.)Não informado. Swine Health and Production. American Association of Swine Practitioners, 2001.
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