TY  - BOOK
AU  - Mutsaers , H.J.W
AU  - Fisher , N.M
AU  - Vogel , W.O
AU  - Palada , M.C
TI  - A Field guide for on-farm research: with special reference to improvement of cropping systems and techniques in west and central Africa
U1  - 338.16 
CY  - Nigeria
PB  - Farming Systems Program
KW  - ON - FARM
KW  - CROPPING SYSTEMS
ER  -