by Bounthom Sisoumang(Kasetsart University, Bangkok (Thailand). Faculty of Economics. Department of Agricutural and Resource Economics), Vute Wangwacharakul(Kasetsart University, Bangkok (Thailand). Faculty of Economics. Department of Agricutural and Resource Economics) E-mail:fecovww@ku.ac.th, Visit Limsombunchai(Kasetsart University, Bangkok (Thailand). Faculty of Economics. Department of Agricutural and Resource Economics)
Published in Witthayasan Kasetsart (Sakha Sangkhommasat) (01.05.2013)