Journal 3,538 Serial 2,301 Government Document 896 Book 288 Newspaper 118 Conference Proceeding 69 Electronic 66 Reference Material 12 Unknown 4 Kit 2 Thesis 2 Audio 1 Book Chapter 1 Manuscript 1 see all ...

Adam Matthew Digital (Firm) 113 Owen, Chandler, 1889-1967 60 Randolph, A. Philip (Asa Philip), 1889-1979 60 Joanna Banks Collection of African American Books (University of Pennsylvania) 52 American Anti-Slavery Society 39 McLellan Lincoln Collection (Brown University) 38 United States Office of Indian Affairs 35 Newberry Library 33 Gotham Book Mart Collection (University of Pennsylvania) 32 United States Department of Energy 32 United States Environmental Protection Agency. Office of Toxic Substances 32 United States National Park Service 30 American Historical Association 28 Congressional Quarterly, inc 28 National Trust for Historic Preservation in the United States 28 Group Research Collection (Columbia University. Libraries) 25 United States Energy Information Administration 25 Harris Collection of American Poetry and Plays (Brown University) Periodicals 24 United States Bureau of Indian Affairs 24 United States Department of Education 24 United States Office of Educational Research and Improvement 24 American Antiquarian Society 22 National Center for Education Statistics 22 Canada Indian and Northern Affairs Canada 21 National Association for the Advancement of Colored People 21 National Urban League 20 American Association for State and Local History 18 American Colonization Society 18 Human Rights Archive (Duke University) 18 Foreign Policy Association 17 see all ...

Civil War, 1861-1865 296 1945-1989 116 20th century 85 1861-1865 74 Revolution, 1775-1783 69 1989- 57 1945- 55 1809-1865 46 Since 1945 39 Colonial period, ca. 1600-1775 37 19th century 34 1861 - 1865 31 Since 1989 25 21st century 24 2001-2009 22 1900-1999 21 1933-1945 20 1945-1953 20 1775-1783 16 1934- 16 1993-2001 15 1963-1969 14 1970- 13 1969-1974 12 To 1775 12 War of 1812 12 1993- 11 1783-1865 10 18th century 10 1971- 10 see all ...

United States 3,215 Canada 170 California 155 America 151 New York (State) 123 North America 99 États-Unis 87 Pennsylvania 78 Confederate States of America 73 États-Unis 59 New York 57 Southwest, New 53 Africa 50 Great Britain 50 Illinois 44 Massachusetts 43 Southern States 41 Japan 38 Arizona 36 Oklahoma 36 New York (N.Y.) 35 Latin America 34 China 33 Philadelphia 32 West (U.S.) 31 New Southwest 29 Alaska 25 Mexico 24 North Carolina 24 European Union countries 23 see all ...