TY  - BOOK
AU  - Anderson,Robert M.
ED  - United States.
ED  - United States
TI  - Water quality in the Allegheny and Monongahela River Basins: Pennsylvania, West Virginia, New York, and Maryland, 1996-98 
SN  - 0607954116
U1  - 363.73942097486 21st ed.
PY  - 2000///].
CY  - [Reston, Virginia]: 
PB  - [U. S. Geological Survey], , [U. S. Department of the Interior]
KW  - Water quality
KW  - Monongahela River Watershed (West Virginia and Pennsylvania)
KW  - Allegheny River Watershed (Pennsylvania and New York)
N1  - Includes bibliographical references (p. 25-26)
ER  -