Ho Trong Phuc และ Napasintuwong Artachinda. (2557) Profit efficiency of hybrid rice production in the central vietnam. Kasetsart university:ม.ป.ท.Ho Trong Phuc และ Napasintuwong Artachinda. 2557. Profit efficiency of hybrid rice production in the central vietnam. ม.ป.ท.:Kasetsart university;Ho Trong Phuc และ Napasintuwong Artachinda. Profit efficiency of hybrid rice production in the central vietnam. ม.ป.ท.:Kasetsart university, 2557. Print.