Toll, Jean Barth and Mildred S. Gillam, eds. Invisible Philadelphia: Community Voluntary Organizations. Philadelphia: Philadelphia History Museum at The Atwater Kent, 1995.
A sprawling historical encyclopedia of voluntary organizations in the city of Philadelphia, including sections, with overviews, on ethnic and racial, religious, social service, and labor organizations; festivals; and hereditary societies.
Referenced in:
The Peopling of Pennsylvania: The Creation of a Multicultural Society