Nitrate in streams in the Great Valley carbonate subunit of the Potomac River Basin
By: by Janet M. Denis and Joel D. Blomquist.
Contributors: Blomquist, Joel D.; Geological Survey (U.S.)
Series: NAWQA fact sheet -- FS-161-95.; NAWQA fact sheet -- FS 95-161.
Publisher: U.S. Geological Survey; U.S.G.S. Earth Science Information Center, distributor
Published: 1995
Place of publication: [Reston, Va.?]; [Denver, CO
Language: eng
Subjects: Water -- Pollution -- Potomac River Watershed.; Nitrates -- Environmental aspects -- Potomac River Watershed.; Agricultural pollution -- Potomac River Watershed.; Potomac River Watershed -- Environmental conditions.
Notes: Caption title.

Shipping list.: no. 96-0169-P.

Includes bibliographical references (p. [4]).