Nirun Sukchun และ Wanchai Thanomsub ; Pornsak Duangpudtan. (2001) Responses of Vegetable Soybean to Irrigation Frequency and Plant Density. <i>Thai Agricultural Research Journal</i>, <i>19</i>(3), 212-222.Nirun Sukchun และ Wanchai Thanomsub ; Pornsak Duangpudtan. "Responses of Vegetable Soybean to Irrigation Frequency and Plant Density". Thai Agricultural Research Journal 19 (2001):212-222.Nirun Sukchun และ Wanchai Thanomsub ; Pornsak Duangpudtan. Responses of Vegetable Soybean to Irrigation Frequency and Plant Density. Department of Agriculture:ม.ป.ท. 2001.