na INLIS000000000025512 Ind 0010-1218007350 The tropical tuber crops: yams, cassava, sweet potato, and coenyams ONWUENE, I.C. I.C. Onwueme New York John Wiley Sons 1978 234 p. : ill. ; 25 cm. 234 p. : ill. ; 25 cm. 635.2ONWt 635.2 TROPICAL CROPS TUBERS 572/79