Somsak Srisombun และ Pornsak Doungpudtarn; Vorayudth Sirichumpan; Booncherd Wimolsujarit; Nipon Iamsupasit; Jaruwan Mankong; Termpong Nuan-on. (1997) Soybean Field Test : Black Seed Soybean Lines. <i>Thai Agricultural Research Journal</i>, <i>15</i>(3), 170-178.Somsak Srisombun และ Pornsak Doungpudtarn; Vorayudth Sirichumpan; Booncherd Wimolsujarit; Nipon Iamsupasit; Jaruwan Mankong; Termpong Nuan-on. "Soybean Field Test : Black Seed Soybean Lines". Thai Agricultural Research Journal 15 (1997):170-178.Somsak Srisombun และ Pornsak Doungpudtarn; Vorayudth Sirichumpan; Booncherd Wimolsujarit; Nipon Iamsupasit; Jaruwan Mankong; Termpong Nuan-on. Soybean Field Test : Black Seed Soybean Lines. Department of Agriculture:ม.ป.ท. 1997.