TY  - BOOK
AU  - Albrecht,Hartmut
TI  - Agricultural extension
T2  - Rural development series
SN  - 3880853649
U1  - 711.3 
PY  - 1989///
CY  - New Delhi
PB  - Wiley-Eastern 
KW  - agricultural extension
N1  - volume.1 :- Basic concepts and methods
ER  -