na INLIS000000000002864 Ind 0010-1118002864 Constraints to high yields on Asian farms : an interim report INTERNATIONAL RICE RESEARCH INSTITUTE International Rice Research Institute Los Banos IRRI 1977 v, 235 p. : ill. ; 22 cm. v, 235 p. : ill. ; 22 cm. 633.18(5)INTc 633.18(5) RICE YIELDS 862/89