"PHMC Historical Markers Search". Pennsylvania Historical and Museum Commission. Commonwealth of Pennsylvania. Archived from the original(Searchable database) on March 21, 2016. Retrieved January 25, 2014.
web.archive.org
"PHMC Historical Markers Search". Pennsylvania Historical and Museum Commission. Commonwealth of Pennsylvania. Archived from the original(Searchable database) on March 21, 2016. Retrieved January 25, 2014.
"Find a County". National Association of Counties. Archived from the original on July 4, 2012. Retrieved June 7, 2011.