Water-quality in the Potomac River basin, Maryland, Pennsylvania, Virginia, West Virginia, and the District of Columbia, 1992-96 /
by Scott W. Ator ... [et al.].
APA Citation
Ator, S. W., Geological Survey (U.S.). (1998). Water-quality in the Potomac River basin, Maryland, Pennsylvania, Virginia, West Virginia, and the District of Columbia, 1992-96. [Reston, Va.?]: U.S. Dept. of the Interior, U.S. Geological Survey.
MLA Citation
Ator, Scott W, and Geological Survey (U.S.). Water-quality In the Potomac River Basin, Maryland, Pennsylvania, Virginia, West Virginia, And the District of Columbia, 1992-96. [Reston, Va.?]: U.S. Dept. of the Interior, U.S. Geological Survey, 1998.
Warning: These citations may not always be complete (especially for serials).