00393nam a2200145Ia 4500041001200000082000800012082001100020245010300031260000900134260003900143260000900182300001500191365002500206650001600231  aEnglish  a633  bFOO/IM  aImprovement and production of maize, sorghum and millet V.2:breeding, agronomy and seed production  aRome  bFood and  Agriculture Organization  c1980  a486  Pages  aRs.162                aField crops