ProQuest (Firm) 965 NetLibrary, Inc 754 Adam Matthew Digital (Firm) 326 Gale (Firm) 294 ebrary, Inc 266 Brown, Tony (Journalist) 212 Historical Society of Pennsylvania 179 EBSCOhost 162 Cannady, James 159 Library of Congress. Congressional Research Service 140 Duke University. Rare Book, Manuscript, and Special Collections Library 122 JSTOR (Organization) 112 Cannady, Sheryl J. 108 Du Bois, W. E. B. (William Edward Burghardt), 1868-1963 108 Kanopy (Firm) 96 United States. Bureau of the Census 95 Gates, Henry Louis, Jr 86 Smithsonian/Folkways Recordings 77 Bloom, Harold 71 Morris, Bob 66 Colgan, Mick 62 Hughes, Langston, 1902-1967 58 Douglass, Frederick, 1818-1895 57 Baraka, Amiri, 1934-2014 56 Folkways Records 55 Adam Matthew Digital 50 Parker, Sheryl J. 49 Haskins, James, 1941-2005 48 SpringerLink (Online service) 48 Films for the Humanities (Firm) 47 United States. Department of the Interior 46 California Newsreel (Firm) 45 McKissack, Pat, 1944-2017 45 Washington, Booker T., 1856-1915 44 United States. Administration on Aging 43 Woodson, Carter Godwin, 1875-1950 43 King, Martin Luther, Jr., 1929-1968 42 Baldwin, James, 1924-1987 41 Marable, Manning, 1950-2011 35 Miller, Kelly, 1863-1939 35 Morrison, Toni 35 United States. Congress. House 35 United States. Office of Education 35 Mosley, Walter 34 Myers, Walter Dean, 1937-2014 34 Stowe, Harriet Beecher, 1811-1896 34 Taylor & Francis 34 Ebook Library 32 Giovanni, Nikki 32 Foner, Philip Sheldon, 1910-1994 31 more ...