1. Geologic map of Pennsylvania;Berg;Pennsylvania Geological Survey, 4th ser., Map 1, scale,1980
2. Glacial-geology of the Anthracite and North Branch Lowland Regions;Braun,1988
3. Glacial and periglacial erosion of the Appalachians;Braun,1989
4. Late Wisconsinan to pre-Illinoian (G?) glacial events in eastern Pennsylvania;Braun,1994