TY  - BOOK
AU  - Singh, Pratibha
AU  - Anoop Singh
AU  - Malaviya, Piyush
TI  - Text book of environment & ecology
SN  - 9788190710497
U1  - 577 
PY  - 2009///
CY  - New Delhi
PB  - ACME Learning
N1  - Includes bibliographical references and index
ER  -