Posas, O. B. (1977). Estrus duration, time of ovulation and percentage conception in beef cattle artificially bred at different time periods after the end of estrus [microform]. Photoduplication Service, University of the Philippines Library.
Chicago-Zitierstil (17. Ausg.)Posas, Oscar Bagarinao. Estrus Duration, Time of Ovulation and Percentage Conception in Beef Cattle Artificially Bred at Different Time Periods After the End of Estrus [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
MLA-Zitierstil (9. Ausg.)Posas, Oscar Bagarinao. Estrus Duration, Time of Ovulation and Percentage Conception in Beef Cattle Artificially Bred at Different Time Periods After the End of Estrus [microform]. Photoduplication Service, University of the Philippines Library, 1977.