TY  - BOOK
AU  - Viessman, Warren
AU  - Knapp, John W.
AU  - Lewis, Gary L.
TI  - Introduction to Hydrology 
SN  - 0700224971
U1  - 551.48 
PY  - 1977///
CY  - New York : 
PB  - Iep-A Dun-Donnelley Publisher, 
KW  - Hydrology
N1  - YY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-7002-2497-1.pdf
ER  -