TY  - BOOK
AU  - Cunningham, William P.
AU  - Saigo, Barbara Woodworth
TI  - Environmental Science a Global Concern 
SN  - 0072909323
U1  - 628 
PY  - 2001///
CY  - Boston : 
PB  - McGraw-Hill, 
KW  - Environmental Sciences
N1  - YY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-07-290932-3.pdf
ER  -