Blackmer, G., compiler. 2005. Preliminary Bedrock Geologic Map of a Portion of the Wilmington 30 by 60 Minute Quadrangle, Southeastern Pennsylvania. Open-File Report OFBM-05-01.0, Pennsylvania Geological Survey.
Chester County Planning Commission. 1973. Chester County Geology. West Chester, PA.
Chester County Planning Commission. 1994 with 2000 update. Chester County Natural Areas Inventory. West Chester, PA.
Fike, J. 1999. Terrestrial and Palustrine Plant Communities of Pennsylvania. PA Dept. of Conservation and Natural Resources. Harrisburg, PA.
Flora of North America Committee. From 1993. Flora of North America, Vol. 2-5, 19-23, 25, 26. Oxford University Press. New York, New York.
Gleason, H. and Cronquist, A. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada, 2nd Ed. The New York Botanical Garden. New York, New York.
Overlease, W. 1983. Checklist of the Flora of Chester County. West Chester University. West Chester, PA.
Penn Pilot – click here for old aerial photos.
Plank, M., Schenck, W., and Srogi, L. 2000. Bedrock Geology of the Piedmont of Delaware and Adjacent Pennsylvania. Report of Investigations No. 59, Delaware Geological Survey.
Rhoads, A. and Block, T. 2007. The Plants of Pennsylvania, 2nd Ed. University of Pennsylvania Press. Philadelphia, PA.
Rhoads A. and Klein, W. 1993. The Vascular Flora of Pennsylvania: Annotated Checklist and Atlas. American Philosophical Society. Philadelphia, PA.
Schultz, C., ed. 1999. The Geology of Pennsylvania. PA Geological Survey. Harrisburg, PA.
Stone, H. 1945. A Flora of Chester County. The Academy of Natural Sciences. Philadelphia, PA.
Weakley, A. 2009. Flora of the Southern and Mid-Atlantic States, working draft of 29 September, 2009. University of North Carolina, Chapel Hill, North Carolina.