TY  - BOOK
AU  - Dhaliwal, G.S.
AU  - Kler, D.S.
TI  - Principles of agricultural ecology
SN  - 9174930108
U1  - 630.2745 DHA 
PY  - 1994///
CY  - Ludhiana
PB  - HImalaya Publishing House
KW  - Ecology
KW  - Agricultural ecology
N1  - BIB
ER  -