(1)
Bishnu Hari Ashikary; Prayoon Swatdee; Somsak Vangnai; Tasnee Attanadana; Prapa Sripichitt. Enhancing Effect of Nitrogen and Phosphorus on Azolla (Azolla microphylly) in Rice Production in Acid Sulphate Soil. Agr. Nat. Resour. 1996, 30, 539-546.