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- Pennsylvania. Department of Conservation and Natural Resources 1 results
- Pennsylvania. Department of General Services 1 results
- Pennsylvania. Department of Transportation. Geographic Information Division 1 results
- Pennsylvania. General Assembly. House of Representatives 1 results
- Pennsylvania. Travel Development Bureau 1 results
- Philadelphia (Pa.) 1 results
- Philadelphia (Pa.) Councils Joint Committee on Water Works and City Property 1 results
- Philadelphia County (Pa.) Committee on Roads and Bridges 1 results
- Philadelphia Parks Alliance 1 results
- Philadelphia Record 16 results
- Regional Planning Federation of the Philadelphia Tri-State District 2 results
- Riley, Edward M. 1 results
- Schermerhorn, Clarence Eaton, 1872-1925 1 results
- Schirmer, Richard C. 1 results
- Sesame Place (Langhorne, Pa.) 2 results
- Shaw, B. Derek 1 results
- Sopko, Jennifer 1 results
- Stotz, Charles Morse 1 results
- Treese, Lorett, 1952- 1 results
- United States. National Park Service. Mid-Atlantic Regional Office 1 results
- University of Pennsylvania. Morris Arboretum 1 results
- Urban Park and Recreation Recovery Program (U.S.) 1 results
- Wallace, Roberts & Todd 2 results
- White, Theophilus Ballou, 1903- 1 results