TY  - BOOK
AU  - DESWAL S. AND DESWAL A.
TI  - A BASIC COURSE IN ENVIRONMENTAL STUDIES 2ND REVISED ED
U1  - 372.357 
PB  - DHANPAT RAI and CO.(P) LTD., NEW DELHI
KW  - ELEM. OF CIVIL ENGINEERING
N1  - 12922
ER  -