Flood tracking chart for the Potomac River Basin [microform] / [prepared by Edward J. Doheny, Timothy W. Auer, and Andrew LaMotte of the U.S. Geological Survey ... ; in cooperation with the U.S. Army Corps of Engineers and the National Weather Service] (U.S. Geological Survey open-file report ; 97-777)
Flood tracking chart for the Potomac River Basin [microform] / [prepared by Edward J. Doheny, Timothy W. Auer, and Andrew LaMotte of the U.S. Geological Survey ... ; in cooperation with the U.S. Army Corps of Engineers and the National Weather Service]