Chookiarti, Y. (1974). A study on the use of artificial insemination, sperm count, volume of semen, and length of reproductive life span of some Duroc and Japanese berkshire boars kept by the Bureau of Animal Industry [microform]. Photoduplication Service, University of the Philippines Library.
Lua i Stíl Chicago (17ú heag.)Chookiarti, Yongyuth. A Study on the Use of Artificial Insemination, Sperm Count, Volume of Semen, and Length of Reproductive Life Span of Some Duroc and Japanese Berkshire Boars Kept by the Bureau of Animal Industry [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.
Lua MLA (9ú heag.)Chookiarti, Yongyuth. A Study on the Use of Artificial Insemination, Sperm Count, Volume of Semen, and Length of Reproductive Life Span of Some Duroc and Japanese Berkshire Boars Kept by the Bureau of Animal Industry [microform]. Photoduplication Service, University of the Philippines Library, 1974.