00452nam a2200193Ia 4500008004100000041001200041082001000053082001100063100001700074100001100091245002100102260001100123260002100134260000900155300001500164365002500179650002700204650002700231150909s9999    xx            000 0 und d  aEnglish  a338.1  bFAR/GR  aFarmer B.H    eEditor  aGreen revolution  aLondon  bMac millan press  c1977  a429  Pages  aRs.143                aAgricultural Economics  aAgricultural Extension