TY  - BOOK
AU  - 
ED  - 
TI  - On-farm research in theory and practice : : proceedings of a workshop on design and analysis of on-farm trials, 1989 
SN  - 9781310642
PY  - 1991///
CY  - Ibadan: 
PB  - International Institute of Tropical Agriculture
KW  -  
KW  -  Agriculture -- Research -- Africa -- On-farm
ER  -