TY  - BOOK
AU  - Albrechel, Hartmut
AU  - Bergmann, Herbert
AU  - Diedrich, George
TI  - Agricultural extensions V .1. basic concepts and methods
SN  - 3 88085  364  9
U1  - 630 .715 
PY  - 1987///
CY  - New Delhi
PB  - Wiley Eastern Ltd
KW  - Agricultural extensions
ER  -