Sutthiporn Poolsawas และ Napasintuwong Artachinda. (2012) Duration analysis of hybrid maize adoption in Thailand. Kasetsart University:ม.ป.ท.Sutthiporn Poolsawas และ Napasintuwong Artachinda. 2012. Duration analysis of hybrid maize adoption in Thailand. ม.ป.ท.:Kasetsart University;Sutthiporn Poolsawas และ Napasintuwong Artachinda. Duration analysis of hybrid maize adoption in Thailand. ม.ป.ท.:Kasetsart University, 2012. Print.