ONWUEME, I.C. The Tropical Tuber Crops : Yams, Cassava Sweet Potatoand Cocoyams / - Great Britain, John Willey &Sons Ltd. 1978 - xiv, 234p.: ill.; picture; 23cm. Includes index and reference ISBN: 047110227 :£2.00 Subjects--Topical Terms: Tropial Tuber Crops Dewey Class. No.: 635.2 ONW