Duffin, J. M. (1996). Guide to records of the sale of commonwealth property in the county of Philadelphia, 1780-1798. [Philadelphia]: Published by the Genealogical Society of Pennsylvania for the Philadelphia Area Consortium of Hereditary and Genealogical Societies.

Duffin, James M. Guide to Records of the Sale of Commonwealth Property in the County of Philadelphia, 1780-1798. [Philadelphia]: Published by the Genealogical Society of Pennsylvania for the Philadelphia Area Consortium of Hereditary and Genealogical Societies, 1996.

Duffin, James M. Guide to Records of the Sale of Commonwealth Property in the County of Philadelphia, 1780-1798. [Philadelphia]: Published by the Genealogical Society of Pennsylvania for the Philadelphia Area Consortium of Hereditary and Genealogical Societies, 1996.