TY  - GEN
AU  - H.J.W. Mutsaers (ed.)
AU  - P. Walker (ed.)
TI  - On-Farm Research: In theory and practice
SN  - 9781310642
PY  - 1991///
CY  - Ibadan
PB  - IITA,, 
KW  - Agriculture - Research - On-Farm
ER  -