00472nam a2200157Ia 4500008004100000020001500041082001600056100001900072245007200091260004000163300000800203650004100211650003400252653001200286653001600298170901s1978    xx            000 0 und d  a0471996084  a635.2bO50T  aOnwueme, I. C. 4aThe Tropical Tuber GropsbYams, Cassava, Sweet Potato, and Cocoyams  aNew YorkbJohn Wiley and Sonsc1978  a234  aAgriculture and related technologies  aTechnology (Applied sciences)  aTropics  aTuber crops