http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Cost-effectiveness of the stream-gaging program in Maryland, Delaware, and the District of Columbia
1 online resource (vii, 85 pages) : illustrations, maps.
by D.H. Carpenter, R.W. James, Jr., and D.F. Gillen.
Includes bibliographical references (pages 84-85).
Water-resources investigations report ; 87-4093