Suchon Tangtaweewipat, and Boonlom Cheva-Isarakul. 1990. “Effect of Different Levels of Sunflower Seed in Broiler Rations”. Agriculture and Natural Resources 24 (4). Bangkok, Thailand:439-56. https://li01.tci-thaijo.org/index.php/anres/article/view/242237.