00469nam a2200157Ia 4500008004100000020001500041082001600056100001800072245006800090260004200158300000800200650004100208650003400249653001200283653001600295170901s1978    xx            000 0 und d  a047110227x  a635.2bO50T  aOnwueme, I.C. 4aThe Tropical Tuber CropsbYams, Cassava, Sweet Potato, Cocoyams  aChichesterbJohn Wiley and Sonsc1978  a234  aAgriculture and related technologies  aTechnology (Applied sciences)  aTropics  aTuber crops