TY  - BOOK
AU  - S.S. Singh
TI  - Principles and Practices of Agronomy
SN  - 81-7096-449-0
U1  - 630 
PY  - 1991///
CY  - New Delhi
PB  - Kalyani Publishers
N1  - S.S. Singh: Principles and Practices of Agronomy.  New Delhi.  Kalyani Publishers, 1991. 81-7096-449-0--(630SIN)
ER  -