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- [7] Alluvial fan of Potomac River BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA, 1931, 42 (1/4): : 825 - 852
- [8] Site conservation planning for the Potomac River Gorge: A partnership between two National Parks and The Nature Conservancy Crossing Boundaries in Park Management: Proceedings of the 11th Conference on Research and Resource Management in Parks and on Public Lands, 2001, : 19 - 24