TY  - BOOK
AU  - Boef, Walter de
TI  - Cultivating knowledge : : genetic diversity, farmer experimentation and crop research 
AV  - S542.3 .B65 1993
PY  - 1993///
CY  - London
PB  - Intermediate Technology Publications, 
KW  -  
KW  - Crops -- Research -- Developing countries
ER  -