00351nam a2200121Ia 4500008004100000082001600041100001500057245005900072260003800131650001600169650002300185650002100208220204s9999    xx            000 0 und d  a631.55bSUD  aSUDHIR SEN 0aRicher harvest: New horizons for developing countries.  aNew DelhibTata McGraw Hillc1974  aAgriculture  aFarm mechanization  aPlant protection