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Pennsylvania Fish & Boat Commission
1
Pennsylvania Historical Association
1
Pennsylvania Railroad
1
Pennsylvania Railroad,
1
Pennsylvania Society for the Promotion of Internal Improvements in the Commonwealth
1
Pennsylvania. Department of General Services
1
Pennsylvania. Department of Transportation
1
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.). Department of Public Property
1
Philadelphia Architects Committee
1
Philadelphia Business Progress Association
1
Philadelphia City Planning Commission
1
Philadelphia Rapid Transit Company Glass Plate Negative Collection
1
Philadelphia Urban Traffic and Transportation Board
1
Robert R. Nathan Associates
1
Rosenberger, E.H.
1
Schoff, Wilfred H. 1874-1932
1
Schuylkill Expressway Improvement Project
1
Smith, Charles Morton
1
Southeastern Pennsylvania Transit Authority
1
Springirth, Kenneth C.,
1
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