Bruce Portugal Amoroto และ Bencharat Sae Chua. (2016) A critical analysis of the Philippine fertilizer, irrigation, extension, loans, dryers, and seeds (F.I.E.L.D.S.) program. Mahidol University:ม.ป.ท.Bruce Portugal Amoroto และ Bencharat Sae Chua. 2016. A critical analysis of the Philippine fertilizer, irrigation, extension, loans, dryers, and seeds (F.I.E.L.D.S.) program. ม.ป.ท.:Mahidol University;Bruce Portugal Amoroto และ Bencharat Sae Chua. A critical analysis of the Philippine fertilizer, irrigation, extension, loans, dryers, and seeds (F.I.E.L.D.S.) program. ม.ป.ท.:Mahidol University, 2016. Print.