TY  - BOOK
AU  - Verma , P.S. .
TI  - Principles of Ecology
U1  - 581.5 
PY  - 1989///
CY  - New Delhi
PB  - S. Chand & Company
KW  - Botany
KW  - Plant Ecology
KW  - G-Botany
N1  - Index
ER  -