Amnat Suwanarit. 1988. Cumulative effects of cropping systems involving corn and legumes on the yields of the thirteenth-year crops. Bangkok:Kasetsart University;
Amnat Suwanarit. (1988) Cumulative effects of cropping systems involving corn and legumes on the yields of the thirteenth-year crops (รายงานผลงานวิจัย). Kasetsart University:Bangkok.
Amnat Suwanarit. Cumulative effects of cropping systems involving corn and legumes on the yields of the thirteenth-year crops. Bangkok:Kasetsart University, 1988.
Amnat Suwanarit. (1988) Cumulative effects of cropping systems involving corn and legumes on the yields of the thirteenth-year crops (รายงานผลงานวิจัย). Kasetsart University:Bangkok.