Graefenstein, G. E. (1957). Business, civic, professional service, trade, women's associations of greater Philadelphia, 1957: A classified directory of associations listing officers, addresses and telephone numbers. [Philadelphia, Pa.]: Chamber of Commerce of Greater Philadelphia.

Graefenstein, Gertrude E. Business, Civic, Professional Service, Trade, Women's Associations of Greater Philadelphia, 1957: A Classified Directory of Associations Listing Officers, Addresses and Telephone Numbers. [Philadelphia, Pa.]: Chamber of Commerce of Greater Philadelphia, 1957.

Graefenstein, Gertrude E. Business, Civic, Professional Service, Trade, Women's Associations of Greater Philadelphia, 1957: A Classified Directory of Associations Listing Officers, Addresses and Telephone Numbers. [Philadelphia, Pa.]: Chamber of Commerce of Greater Philadelphia, 1957.