TY  - BK
AU  - Aflakpui,G.K.S.
AU  - Dapaah,H.K.
TI  - Introduction to on-farm research
T2  - CRI Crop Management Guide
PY  - 1993///
CY  - Tamale (Ghana)
PB  - CRI, 
KW  - Case studies
KW  - Research policies
ER  -