Manida Phadungkul. (1991) Feasibility studies of planting corn, sorghum and cowpea for livestock in dry season. Mahidol University,:ม.ป.ท.Manida Phadungkul. 1991. Feasibility studies of planting corn, sorghum and cowpea for livestock in dry season. ม.ป.ท.:Mahidol University,;Manida Phadungkul. Feasibility studies of planting corn, sorghum and cowpea for livestock in dry season. ม.ป.ท.:Mahidol University, 1991. Print.