www.usgs.gov
 

Selected Works

o "Brecknock Township, Lancaster County, PA" (US Geological Survey, 1977). Also usgwarchives.org/map...as/usgs/brecknoc.jpg (US GenWeb; accessed 2006 Jun 30).

o "Earl Township, Lancaster County, PA" (US Geological Survey, 1977). Also usgwarchives.org/map...lancas/usgs/earl.jpg (US GenWeb; accessed 2006 Jun 30).

o "National Atlas of the United States," nationalatlas.gov (US Geological Survey, 2006; accessed 2006 Nov 13).