1. Physiographic analysis of witness-tree distribution (1765–1798) and present forest cover through north central Pennsylvania;Abrams;Can. J. For. Res.,1995
2. The Periglaciation of Great Britain;Ballantyne,1994
3. Berg, T.M., Edmunds, W.E., Geyer, A.R., 1980. Geologic map of Pennsylvania (2nd ed.): Pennsylvania Geological Survey, 4th ser., Map 1, 3 sheets, scale 1:250,000. http://www.gis.dcnr.state.pa.us/geology/index.html (accessed 6 March 2019).
4. A map of Pleistocene aeolian deposits in Western Europe, with special emphasis on France;Bertran;J. Quat. Sci.,2016
5. Last glacial loess in the conterminous USA;Bettis;Quat. Sci. Rev.,2003