TY  - BOOK
AU  - VERMA, P. S.
AU  - AGARWALA, V. K.
TI  - ENVIRONMENTAL BIOLOGY PRINCIPLES OF ECOLOGY
U1  - 577 VER 
PY  - 1995///
CY  - NEW DELHI
PB  - S.CHAND & COMPANY
KW  - Ecology
ER  -