Adam Matthew Digital (Firm) 312,665
Alexander Street Press 111,843
Anon 55,332
Adam Matthews Digital (Firm) 43,481
American Society for Testing and Materials 30,735
ASTM International 28,745
Anne S.K. Brown Military Collection 27,612
AM (Publisher) 24,593
Alumni and Friends Memorial Book Fund 20,847
ANON 12,565
Anne and Joseph Trachtman Memorial Book Fund 10,735
American Culture Class Collection (University of Pennsylvania) 10,125
American Council of Learned Societies 9,307
Aristotle 8,475
Arshavskai︠a︡, Z. A (Zoi︠a︡ Aleksandrovna) 5,671
American and French Research on the Treasury of the French Language (Project) 4,918
Augustine, of Hippo, Saint, 354-430 4,178
Association for Computing Machinery 3,978
Ames Research Center 3,968
Andersen, H. C (Hans Christian), 1805-1875 3,863
Austria 3,791
Asian Development Bank 3,728
Anderson Galleries, Inc 3,701
American Law Institute 3,345
Aeschylus 3,209
Argentina 3,180
Association for Computing Machinery-Digital Library 3,119
Archives of Czechs and Slovaks Abroad 3,025
Aristophanes 2,953
Aesop 2,791
Anonymous 2,778
Arts and Entertainment Network 2,761
Academy of St. Martin-in-the-Fields 2,689
American Tract Society 2,644
American Automobile Association 2,624
Automobile Club of Southern California 2,549
American Art Association 2,509
Army War College (U.S.) Strategic Studies Institute 2,462
American Society of Mechanical Engineers 2,371
Akademii︠a︡ nauk SSSR 2,357
Addison, Joseph, 1672-1719 2,350
Armstrong, Louis, 1901-1971 2,286
ACM Digital Library 2,240
American Management Association 2,217
Amnesty International 2,202
Arts Council of Great Britain 2,127
American Chemical Society Meeting 2,101
Art Institute of Chicago 2,064
American Board of Commissioners for Foreign Missions 2,035
Abbado, Claudio 2,034
Anderson, Alexander, 1775-1870 1,992
Austen, Jane, 1775-1817 1,947
American Enterprise Institute for Public Policy Research 1,905
Ashkenazy, Vladimir, 1937- 1,854
American Library Association 1,845
Albéniz, Isaac, 1860-1909 1,836
American Institute of Physics 1,831
American Association of State Highway and Transportation Officials 1,793
American Art Association, Anderson Galleries (Firm) 1,791
Abbott, Jacob, 1803-1879 1,772
American Bar Association 1,737
American Medical Association 1,719
Arthur Billings Hunt Collection (Columbia University. Libraries) 1,719
American University (Washington, D.C.) Foreign Area Studies 1,716
Ariosto, Lodovico, 1474-1533 1,677
Adam Matthew Publications 1,671
Avicenna, 980-1037 1,665
American Psychological Association 1,664
American Unitarian Association 1,664
Arthur, T. S (Timothy Shay), 1809-1885 1,644
Argonne National Laboratory 1,628
Archive of Documentary Arts (Duke University) 1,618
Albinoni, Tomaso, 1671-1750 1,552
ACLS Humanities E-Book (Organization) 1,551
Auden, W. H (Wystan Hugh), 1907-1973 1,551
ABC News 1,542
Arne, Thomas Augustine, 1710-1778 1,516
American Society of Civil Engineers 1,479
ARTE France 1,473
American Sunday-School Union 1,419
Amsterdam (Netherlands) Stedelijk Museum 1,411
American Academy of Political and Social Science 1,379
Asahi Shinbunsha 1,366
Australian Bureau of Statistics 1,356
American Chemical Society 1,351
Arthur Tress Collection of Japanese Illustrated Books (University of Pennsylvania) 1,348
Akademii͡a nauk SSSR 1,337
American Mathematical Society 1,320
American Association for the Advancement of Science 1,319
American Institute of Aeronautics and Astronautics 1,310
Arnold, Malcolm 1,305
Anchor Bay Entertainment, Inc 1,303
Abt Associates 1,291
American Bible Society 1,290
American Society of Mechanical Engineers Winter Annual Meeting 1,276
Afrika Bambaataa Hip Hop Archive Numbered annotated vinyl discs 1,273
Apollinaire, Guillaume, 1880-1918 1,231
Arthur D. Little, Inc 1,228
Adam, Adolphe, 1803-1856 1,224
Atha Tehon Thiras Collection (University of Pennsylvania) 1,210