TY  - BOOK
AU  - Marvey F Ludwing
TI  - MANUAL OF environmental technology in developing c
U1  - U:(G:55).1(X).N9, N1.1-N1.2 
PY  - 1991///
CY  -  New Delhi 
PB  - South Asian Publishers India      
KW  - Geography - Environment
ER  -