TY  - BOOK
AU  - Hart,La Vaughn
AU  - Heah,Carmel
TI  - Introduction to environmental engineering
SN  - 0070159114
U1  - TD/145 
PY  - 1991///
CY  - New York
PB  - McGraw-Hill
KW  - Environmental engineering.
N1  - Notes Registration No 6698
ER  -