TY  - BOOK
AU  - de vries, C.A. comp.
TI  - Agricultural extension in the developing countries; a bibliography
U1  - 016:374:63(-77) K8 
PY  - 1968///
CY  - Wageningein
PB  - International Institute, Land Reclamation and Improvement
KW  - C.A. de vries
KW  - Extension
ER  -