Special publication / South Central Pennsylvania Genealogical Society ; no. 66, August 2007 - no. 69, March 2009 - no. 70, December 2010 - no.72, April 2012 - no. 74, March 2013 - no. 76, April 2014 - no. 78, April 2015.
Buried genealogical data : a complete list of addressed letters left in the post offices of Philadelphia, Chester, Lancaster, Trenton, New Castle & Wilmington between 1748 and 1780