00391nam a2200121Ii 4500040000800000082002600008245006400034260006500098300003900163650000900202650001600211710004200227  cDDC  a633 INT 1979 A109 Or.00aFarm-level constraints to high rice yields in Asia, 1974-77  aLos Ba©łos :bInternational Rice Research Institute,c1979  ax, 411 p. :bill., graphs ;c23 cm 0aRice 0aCrop yields2 aInternational Rice Research Institute