00390nam a2200121Ii 4500040000700000082002600007245006400033260006500097300003900162650000900201650001600210710004200226  c77  a197 FAR 1979 C077 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