Book 25,766 Government Document 3,767 Map 2,532 Serial 2,132 Electronic 2,083 Journal 745 Unknown 557 Thesis 516 Kit 437 Newspaper 365 Reference Material 301 Photo 264 Book Chapter 153 Conference Proceeding 152 Manuscript 124 Audio 37 Musical Score 35 Physical Object 4 Article 3 see all ...

H - Social Science 3,443 F - General American History 3,086 G - Geography, Anthropology, Recreation 1,825 K - Law 1,634 E - United States History 1,396 L - Education 1,062 P - Language and Literature 1,019 N - Fine Arts 776 Q - Science 766 M - Music 711 Z - Library Science 678 T - Technology 653 B - Philosophy, Psychology, Religion 588 A - General Works 578 C - Historical Sciences 549 R - Medicine 501 S - Agriculture 463 J - Political Science 424 D - World History 101 U - Military Science 49 V - Naval Science 42 see all ...

Geological Survey (U.S.) 1,307 Maryland 903 United States Congress 708 Maryland Geological Survey 554 United States Bureau of the Census 285 Maryland General Assembly 269 Regional Planning Council (Md.) 263 Maryland General Assembly. House of Delegates 251 United States Congress. House. Committee on Rivers and Harbors 226 Maryland Historical Society 213 United States War Department 185 Maryland State Planning Commission 184 Baltimore (Md.) 181 United States Congress. House 174 Maryland Court of Appeals 165 United States 164 Maryland-National Capital Park and Planning Commission 153 Harris Collection of American Poetry and Plays (Brown University) Broadsides 144 Baltimore and Ohio Railroad Company 128 United States National Park Service 125 Rand McNally and Company 119 Maryland Agricultural Experiment Station 118 Maryland General Assembly. Senate 112 Douglass, Frederick, 1818-1895 108 U.S. Fish and Wildlife Service 104 Federal Financial Institutions Examination Council (U.S.) 99 United States Soil Conservation Service 99 American Automobile Association 97 Baltimore Museum of Art 96 Chesapeake and Delaware Canal Company 96 see all ...

English 32,425 German 323 No linguistic content 154 French 142 Latin 117 Spanish 72 Hebrew 32 Undetermined 30 Italian 15 Russian 10 Chinese 8 Swedish 8 Arabic 7 Japanese 7 Dutch 6 Korean 6 Polish 6 Lithuanian 5 Portuguese 5 Yiddish 4 Greek 3 Danish 2 Estonian 2 Filipino 2 Finnish 2 Multiple 2 Tamil 2 Ukrainian 2 Ancient Greek 1 Catalan 1 see all ...

Maps 2,736 History 2,273 Electronic books 1,782 Periodicals 1,695 Broadsides 1,238 Biography 1,132 Statistics 991 Almanacs 648 Genealogy 618 Biographies 591 Fiction 568 Pictorial works 471 Catalogs 436 Topographic maps 419 Early works to 1800 402 Sources 378 Newspapers 370 Playbills 345 Booksellers' advertisements 327 Directories 302 Advertisements 255 Trials, litigation, etc 248 Bibliography 236 Guidebooks 235 Printed ephemera 223 Illustrated works 193 Congresses 186 Early works 186 Registers 186 Case studies 177 see all ...

19th century 898 Colonial period, ca. 1600-1775 888 Civil War, 1861-1865 780 18th century 531 1775-1865 510 20th century 465 1861-1865 360 Revolution, 1775-1783 304 1600-1775 249 To 1775 245 1800-1899 204 War of 1812 175 1775-1783 168 1900-1999 137 1861 - 1865 135 1600 - 1775 128 1700-1799 106 1818-1895 106 Early works to 1800 106 17th century 104 1775 - 1865 93 1862 93 1700 - 1799 92 1800 - 1899 77 1717-1779 64 21st century 64 1775 - 1783 63 Civil War, 18611865 60 1819 59 Colonial period 57 see all ...