TY  - BOOK
AU  - TYAGI,P.N.
TI  - Textbook of Ecology
SN  -  9789382126102
U1  - 577 
PY  - 2013///
CY  - New Delhi
PB  - Astha Pub.
KW  - Ecology
N1  - Includes glossary and bibliographical references
ER  -