| Bibliothèque Nationale de France | (English version) |
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| Books and serials published, printed or distributed in France and received by the Bibliothèque Nationale de France through legal deposit. |
| Columbia University Libraries Library Web | |
| Cornell University Library Gateway | |
| Dartmouth College Library | |
| Harvard University Libraries | |
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| Library of Congress | Services, catalogs, exhibitions, American Memory Project - many images and documents online, THOMAS - full text of bills, laws, reports, votes, etc. |
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| Catalog searchable by: word, browse, command, and experimental searches. |
| MELVYL | University of California System Catalog. The system can search the UC Melvyl union catalog (materials at all UC campuses plus other locations), the Periodicals database (periodical titles at UC and other California libraries), and other databases and Internet resources. |
| National Library of Canada | Canadian books and periodicals, government information, images, music, etc. |
| New York Public Library | |
| Princeton University Library | |
| Summit | A library catalog that combines information from Pacific Northwest academic libraries into a single unified database |
| University of Chicago Library | |
| University of Oregon Library System | |
| University of Pennsylvania Library | |
| University of Texas Library | |
| University of Washington Library | |
| University of Wisconsin Madison Libraries | |
| Yale University Library | |