TY  - BOOK
AU  - Singh,S.S., x
AU  - x
TI  - Principles and practice of agronomy: x
SN  - 8176638587
U1  - 630/S617p 
PY  - 2004///
CY  - New Delhi
PB  - Kalyani Pub
KW  - Agriculture
N1  - x
ER  -