BAIF Development Research Foundation; Winrock International Center for Economic Policy Studies; FAO; Nitrogen Fixing Tree Association; IDRC; Taylor, D.A.(Kaselsart University, Bangkok, TH, 1992)
SEAFDEC Aquaculture Dept.; Villaluz, A.C.; Villaver, W.R.; Salde, R.J.(Aquaculture Dept., Southeast Asian Fisheries Development Center, Iloilo City, PH, 1983)