Markvichitr, K., Innuraksa, P., Tumwasorn, S., & Kaewsuwan, S. (1997). Reproductive and Growht Performance Test of Crossbreds Beef Bulls ( 1/2 Charolais 1/4 Brahman 1/4 Native) for Beef Production Efficinecy Improvement in Thailand. Agriculture and Natural Resources, 31(3), 297–304. retrieved from https://li01.tci-thaijo.org/index.php/anres/article/view/240941