TY  - BOOK
AU  - Onwueme, I. C
AU  - Sinha, T. D
ED  - Technical Centre for Agricultural and Rural Cooperation (CTA)
TI  - Field crop production in tropical Africa: principles and practice 
SN  - 9290810866
AV  - CTA(02) 
PY  - 1991///
CY  - Ede, The Netherlands
PB  - CTA
KW  - TROPICAL CROPS--AFRICA, SUB-SAHARAN
KW  - CROPS PRODUCTION
KW  - FIELD CROPS--AFRICA, SUB-SAHARAN
KW  - YAMS
ER  -