Adam Matthew Digital (Firm) 312,665
Alexander Street Press 111,839
Anon 55,333
Adam Matthews Digital (Firm) 43,481
American Society for Testing and Materials 30,736
ASTM International 28,745
Anne S.K. Brown Military Collection 27,612
AM (Publisher) 26,510
Alumni and Friends Memorial Book Fund 20,869
ANON 12,566
Anne and Joseph Trachtman Memorial Book Fund 10,735
American Culture Class Collection (University of Pennsylvania) 10,124
American Council of Learned Societies 9,307
Aristotle 8,479
Arshavskai︠a︡, Z. A (Zoi︠a︡ Aleksandrovna) 5,671
American and French Research on the Treasury of the French Language (Project) 4,918
Anonymous 4,212
Augustine, of Hippo, Saint, 354-430 4,179
Association for Computing Machinery 3,979
Ames Research Center 3,968
Andersen, H. C (Hans Christian), 1805-1875 3,864
Austria 3,795
Asian Development Bank 3,728
Anderson Galleries, Inc 3,703
American Law Institute 3,348
Aeschylus 3,210
Argentina 3,182
Association for Computing Machinery-Digital Library 3,119
Archives of Czechs and Slovaks Abroad 3,025
Aristophanes 2,954
Aesop 2,792
Arts and Entertainment Network 2,761
Academy of St. Martin-in-the-Fields 2,691
American Tract Society 2,645
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 2,497
American Society of Mechanical Engineers 2,372
Akademii︠a︡ nauk SSSR 2,357
Addison, Joseph, 1672-1719 2,350
Armstrong, Louis, 1901-1971 2,287
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 2,065
American Board of Commissioners for Foreign Missions 2,035
Abbado, Claudio 2,034
Anderson, Alexander, 1775-1870 1,994
Austen, Jane, 1775-1817 1,947
American Enterprise Institute for Public Policy Research 1,906
Ashkenazy, Vladimir, 1937- 1,854
American Library Association 1,845
Albéniz, Isaac, 1860-1909 1,839
American Institute of Physics 1,832
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 1,740
American Medical Association 1,721
Arthur Billings Hunt Collection (Columbia University. Libraries) 1,719
American University (Washington, D.C.) Foreign Area Studies 1,717
Ariosto, Lodovico, 1474-1533 1,677
Adam Matthew Publications 1,671
Avicenna, 980-1037 1,668
American Unitarian Association 1,665
American Psychological Association 1,664
Arthur, T. S (Timothy Shay), 1809-1885 1,644
Archive of Documentary Arts (Duke University) 1,637
Argonne National Laboratory 1,628
Albinoni, Tomaso, 1671-1750 1,553
Auden, W. H (Wystan Hugh), 1907-1973 1,552
ACLS Humanities E-Book (Organization) 1,551
ABC News 1,545
Arne, Thomas Augustine, 1710-1778 1,517
American Society of Civil Engineers 1,479
ARTE France 1,474
American Sunday-School Union 1,419
Amsterdam (Netherlands) Stedelijk Museum 1,392
American Academy of Political and Social Science 1,379
Asahi Shinbunsha 1,366
Arthur Tress Collection of Japanese Illustrated Books (University of Pennsylvania) 1,359
Australian Bureau of Statistics 1,357
American Chemical Society 1,351
Akademii͡a nauk SSSR 1,335
Arnold, Malcolm 1,328
American Mathematical Society 1,320
American Association for the Advancement of Science 1,319
American Institute of Aeronautics and Astronautics 1,310
Anchor Bay Entertainment, Inc 1,305
Abt Associates 1,291
American Bible Society 1,291
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 1,226
Atha Tehon Thiras Collection (University of Pennsylvania) 1,211