TY  - DATA
AU  - Asthana,D.K.
AU  - Asthana,Meera
TI  - Environment: problems and solutions 
SN  - 8121916542
U1  - 628 22
PY  - 1998///
CY  - New Delhi
PB  - S. Chand & Company Ltd
KW  - Environmental protection engineering
N1  - Includes bibliographical references and index
ER  -