TY  - BOOK
AU  - S.S. Singh
TI  - Principles and Practices of Agronomy
SN  - 81-7663-858-7
U1  - 630 
PY  - 1988///
CY  - Ludhiyana
PB  - Kalyani Publishers
N1  - S.S. Singh: Principles and Practices of Agronomy.  Ludhiyana.  Kalyani Publishers, 1988. 81-7663-858-7--(630SIN)
ER  -