Book 349 Map 112 Government Document 50 Serial 44 Journal 11 Kit 11 Electronic 10 Thesis 7 Conference Proceeding 6 Photo 5 Unknown 4 Newspaper 1 Physical Object 1 Reference Material 1 see all ...

H - Social Science 175 G - Geography, Anthropology, Recreation 53 T - Technology 35 L - Education 13 F - General American History 9 K - Law 6 N - Fine Arts 5 C - Historical Sciences 4 Z - Library Science 3 A - General Works 1 B - Philosophy, Psychology, Religion 1 D - World History 1 E - United States History 1 M - Music 1 P - Language and Literature 1 R - Medicine 1 S - Agriculture 1 U - Military Science 1 see all ...

Pennsylvania Department of Highways 63 United States Public Roads Administration 54 Delaware Valley Regional Planning Commission 38 Pennsylvania Department of Transportation 26 Delaware River Port Authority 21 Southeastern Pennsylvania Transportation Authority 17 United States Bureau of Public Roads 17 Pennsylvania Department of General Services 13 Penn Jersey Transportation Study 11 Pennsylvania Department of Transportation. Geographic Information Division 11 Philadelphia (Pa.) Urban Traffic and Transportation Board 11 Pennsylvania Railroad 10 Philadelphia City Planning Commission 8 Furniss, Robert 6 Geological Survey (U.S.) 6 Henderson, Thomas Frisby 6 Pennsylvania Governor's Committee for Transportation 6 Tatlow, Joseph 6 United States Bureau of the Census 6 Pennsylvania Department of Transportation. Cartographic Information Division 5 Pennsylvania Economy League 5 Pennsylvania Transportation and Telegraph Department 5 American Association of State Highway and Transportation Officials 4 Bureau of Municipal Research (Philadelphia, Pa.) 4 Coxe, Tench, 1755-1824 4 International Congress of Navigation Philadelphia 4 Kline, Benjamin F. G 4 Lackawaxen Coal Mine and Navigation Company 4 Pennsylvania Department of Commerce 4 Pennsylvania Economy League Eastern Division 4 see all ...

English 528 No linguistic content 6 German 2 French 1 Greek 1 Spanish 1

Maps 116 Road maps 61 Periodicals 36 History 35 Statistics 20 Tourist maps 15 Advertisements 10 Broadsides 10 Electronic books 10 Charters 5 Charters and articles of incorporation 5 Conference papers and proceedings 5 Early works 5 In art 5 Account books 4 Early works to 1800 4 Photograph 4 Pictorial works 4 Portraits 4 By-laws 3 CD-ROMs 3 Census, 1990 3 Congresses 3 Correspondence 3 Early works to 1850 3 Letters 3 Photograph albums 3 Photographs 3 Trials, litigation, etc 3 Biographies 2 see all ...

19th century 17 Civil War, 1861-1865 11 1800-1899 5 20th century 5 1861 - 1865 4 1861-1865 (Guerre de Sécession) 2 1900-1999 2 19e siècle 2 1765-1825 1 1775-1783 1 1775-1865 1 1798-1868 1 1800 - 1899 1 1819-1897 1 1821-1900 1 1824-1891 1 1828 1 1832-1924 1 1836 1 1836-1889 1 1836-1907 1 1837 1 1839-1897 1 1839-1924 1 1841-1908 1 1843-1910 1 1844-1915 1 1847-1903 1 1847-1911 1 1849-1853 1 see all ...