TY  - BOOK
AU  - Albrecht,Harmut.
AU  - Bergmann,Herbert and Diederich,George eta l
TI  - Agriculture extension volume 1: Basic concepts and methods
SN  - 3880853649
AV  - 630.715 ALB
U1  - 630.715 
PY  - 1989///
CY  - New Delhi
PB  - Wiley eastern ltd.
ER  -