Sukum Chotechaungmanerat. 1991. Study on the role of green-manure legumes in corn cropping system. Bangkok:Kasetsart University;
Sukum Chotechaungmanerat. (1991) Study on the role of green-manure legumes in corn cropping system (รายงานผลงานวิจัย). Kasetsart University:Bangkok.
Sukum Chotechaungmanerat. Study on the role of green-manure legumes in corn cropping system. Bangkok:Kasetsart University, 1991.
Sukum Chotechaungmanerat. (1991) Study on the role of green-manure legumes in corn cropping system (รายงานผลงานวิจัย). Kasetsart University:Bangkok.