TY  - BOOK
AU  - Choudhary, Narendra
TI  - Social, psychological and economic barriers to adoption of high yielding varieties among the small farmers
U1  - 630.715 C 4578 S 
PY  - 1970///
CY  - Bhagalpur
PB  - BAC, Sabour
KW  - Extension
ER  -