Author
Chamber of Commerce of Greater Philadelphia
2
Delaware and Atlantic Telegraph and Telephone Company
2
Delaware, Lackawanna and Western Railroad Company
2
Elise Willing Balch Collection
2
American Tract Society
1
Collom, William
1
Crittenden, J. P.
1
Delaware Bridge Joint Commission of the States of Pennsylvania and New Jersey
1
Delaware River Joint Commission of Pennsylvania and New Jersey
1
Emily Swift Balch Collection
1
George de Benneville Keim Memorial Collection
1
Girard Trust Company Real Estate Department
1
Helffrich, Charles B.
1
Marquis, Albert Nelson, 1855-1943
1
Penjerdel (Corporation)
1
Rosenberger, E. H.
1
Sharp, Joshua
1
Shoemaker, A.
1
Southern Baptist Convention. Historical Commission
1
Special Libraries Association. Philadelphia Chapter
1
Special Libraries Council of Philadelphia and Vicinity
1
Thomas Balch Collection
1
United States. Army. Corps of Engineers
1
United States. Board of Engineers for Rivers and Harbors
1
United States. Maritime Administration
1
United States. Maritime Commission
1
Zagat Survey (Firm)
1