Author
Graf, William B.
2
Wilhelm, Otto G.
2
Aczel, Aurel
1
Aczél, Aurél
1
Anderson, Matthew, 1847-1913
1
Banneker, Benjamin, 1731-1806
1
Berean Institute (Philadelphia, Pa.)
1
L. Johnson & Co. (Philadelphia)
1
Pennsylvania Arts and Sciences Society
1
Philadelphia (Pa.). Department of Records
1
Philadelphia Ceili Group
1
Philadelphia Foundation
1
Rabbit (Club)
1
Urban League of Philadelphia
1