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
Cost effectiveness of the stream gaging program in Maryland, Delaware, and the District of Columbia
vii, 85 pages : illustrations, maps ; 28 cm.
by D.H. Carpenter, R.W. James, Jr., and D.F. Gillen.
Water-resources investigations report ; 87-4093