Nitrate in streams in the Great Valley carbonate subunit of the Potomac River Basin

Main Author: Denis, Janet M.
Other Authors: Blomquist, Joel D., Geological Survey (U.S.)
Format: Book
Language: English
Published: [Reston, Va.?] : [Denver, CO] : U.S. Geological Survey ; [U.S.G.S. Earth Science Information Center, distributor], [1995]
Physical Description: 4 unnumbered pages : color illustrations, maps (some color) ; 28 cm.
Also available on the Internet.
Series: NAWQA fact sheet ; FS-95-161.
Subjects:
Online Access: http://md.water.usgs.gov/publications/fs-95-161/
http://pubs.er.usgs.gov/publication/fs16195
connect to online version.