TY  - BOOK
AU  - Chawla,Shashi
TI  - A textbook of environmental studies
SN  - 9781259006388
PY  - 2012///
CY  - New Delhi
PB  - Tata McGraw Hill
KW  - Environmental sciences
KW  - Study and teaching
KW  - Textbooks
KW  - Human ecology
N1  - Includes bibliographical references and index
ER  -