na INLIS000000000004809 20241107023215 0010-1124000151 633.18(5) INT f International Rice Research Institute, Farm-level constraints to high rice yields in Asia : 1974-1977 / International Rice Research Institute Los Banos, Laguna, the Philippines : International Rice Research Institute, 1979 411 p. ; 23 cm FARM-LEVEL, CONSTRAINTS, YIELDS, ASIA, 1974-77, RICE BREEDING BBPSI Padi 132/1980