Maw และผู้แต่งคนอื่นๆ. (2011) Effects of nitrogen fertilizer on dry matter accumulation, seed yield and seed composition of soybean cultivars. Kasetsart University,:ม.ป.ท.Maw และผู้แต่งคนอื่นๆ. 2011. Effects of nitrogen fertilizer on dry matter accumulation, seed yield and seed composition of soybean cultivars. ม.ป.ท.:Kasetsart University,;Maw และผู้แต่งคนอื่นๆ. Effects of nitrogen fertilizer on dry matter accumulation, seed yield and seed composition of soybean cultivars. ม.ป.ท.:Kasetsart University, 2011. Print.