TY  - BOOK
AU  - Singh, Alam
AU  - Sharma, U.S.
TI  - Environmental enginnering
SN  - 0253-5114
U1  - 628 
PY  - 1984///
CY  - Delhi
PB  - International book
KW  - Environmental enginnering
KW  - Refuse and refuse disposal
KW  - Water purification
N1  - Include biblographical references
ER  -