National Water-Quality Assessment program
Subtitle: the Potomac River basin.
Contributors: Geological Survey (U.S.)
Series: Water fact sheet; Open-file report -- 91-157; U.S. Geological Survey open-file report -- 91-157.
Publisher: U.S. Geological Survey, Dept. of the Interior; Books and Open-File Reports Section, distributor
Published: 1991
Place of publication: [Reston, VA]; [Denver, Colo
Language: eng
Format: Microform
Subjects: Water quality -- Potomac River Watershed.
Other titles: Potomac River basin
Notes: Distributed to depository libraries in microfiche.

Shipping list no.: 92-0659-M.

Microfiche. [Denver, Colo. : U.S. Geological Survey, 1991] 1 microfiche.