Directors — 1948 to Present
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1948-1950—William Leibowitz, Assistant Librarian (in charge)
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1948-1965—Louis A. Schreiber, Assistant Librarian (in charge), 1950-1953; Director of Administrative Services, 1953-1965
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1955—Ludwig Lewisohn, Librarian, (died December 1955)
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1956-1959—Marvin Lowenthal, Director of Special Services
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1963-1967—Louis Kronenberger, Librarian
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1965-1967—Harry Tarlin, Acting Director of Administration Services
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1967-1969—Ronald V. Glens, Director of Administrative Services, July 1969-February 1970
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July 1969-February 1970—Norbert Bernstein, Acting Director of Administrative Services, March 1970-June 1980
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March 1970-June 1980—D. Roy Watkins, Director of Libraries, 1970-1975; University Librarian, 1976-1980
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July 1980-January 1981—Rupert Gilroy, Acting University Librarian
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February 1981-[2002]—Bessie K. Hahn, Director of Library Services, 1981-1996; Assistant Provost for Libraries and University Librarian, 1996 to the Present