Atthaporn Roongsitthichai, Seri Koonjaenak, and Padet Tummaruk. “Backfat Thickness at First Insemination Affects Litter Size at Birth of the First Parity Sows”. Agriculture and Natural Resources 44, no. 6 (December 30, 2010): 1128–1136. Accessed May 19, 2024. https://li01.tci-thaijo.org/index.php/anres/article/view/245094.