Home › Authors › U.S. Geological Survey Water-Quality Workshop, Northeastern Region (1st 1986 Shenandoah National Park, Va.) 👤 U.S. Geological Survey Water-Quality Workshop, Northeastern Region (1st 1986 Shenandoah National Park, Va.) 1 book Books by U.S. Geological Survey Water-Quality Workshop, Northeastern Region (1st 1986 Shenandoah National Park, Va.) Abstracts from the technical s Abstracts from the technical sessions of the first U.S. Geological Survey Water-Quality Workshop, Northeastern Region, Skyland, Virginia, March 31- April 3, 1986 1991