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Pennsylvania. Department of Transportation. Cartographic Information Division
1
Pennsylvania. General Assembly. House of Representatives. Committee on Inland Navigation and Internal Improvement
1
Pennsylvania. Supreme Court
1
Petroleum Producers Union General Council
1
Philadelphia (Pa.) Urban Traffic and Transportation Board
3
Philadelphia (Pa.). Department of Public Property
1
Philadelphia (Pa.). Urban Traffic and Transportation Board
3
Philadelphia Architects Committee
1
Philadelphia Business Progress Association
1
Philadelphia City Planning Commission
1
Philadelphia Rapid Transit Company
4
Philadelphia Rapid Transit Company Glass Plate Negative Collection
1
Philadelphia Urban Traffic and Transportation Board
1
Reading Company
3
Robert R. Nathan Associates
1
Rosenberger, E.H.
1
Schoff, Wilfred H. 1874-1932
1
Schuylkill Expressway Improvement Project
1
Shank, William H.
2
Smith, Charles Morton
1
Southeastern Pennsylvania Transit Authority
1
Southeastern Pennsylvania Transportation Authority
6
Springirth, Kenneth C.,
1
Still, William, 1821-1902
2
Swetnam, George
1
Szilagyi, Mike
1
Turnpike Engineers Inc
1
Twining, William S.
1
United States. Department of the Treasury
1
Unknown author
1
Whidden, Guy C. 1868-
1
Whiteman, Maxwell
1
Wiegand, W. F. (William F.)
1
Wilbur Smith and Associates
1
Williams, Gerry
1
YA Pamphlet Collection (Library of Congress)
1