TY  - BOOK
AU  - Singh, S. S.
TI  - Principles & practices of agronomy
SN  - 8176638587
U1  - 630 23
PY  - 1991///
CY  - Ludhiana
PB  - Kalyani Publishers
KW  - Agronomy
N1  - Includes index; Includes bibliographical references
ER  -