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Talmud Manuscripts Project - (Jewish National and University Library) searchable database of electronic facsimiles of Babylonian Talmud manuscripts and the Kaufmann manuscript of the Mishnah [Budapest, Hungarian Academy of Sciences MS A 50]
The Steinschneider Bibliographical Database - A Digital and Bibliographical Framework for Research into Pre-Modern Hebrew Works in Philosophy, Science, and Belles-Lettres (Charles H. Manekin, Project Director - Maryland Institute for Technology in the Humanities)
Leuven database of ancient books - Database of information on all ancient literary Greek and Roman texts dating from the fourth century B.C.E. to C.E. 800, and incorporating authors from Homer (8th cent. B.C.E.) to Romanus Melodus (6th cent. C.E.)