Guide to the Research Collections
The books located in the Preparation Services bear the classmark "Ref. Cat." (Reference Catalog); they are entered in the Public Catalog and may be secured for use in the Main Reading Room by submitting call slips in the usual manner. The section dealing with bibliography numbers about 1,000 volumes. It is composed principally of national bibliographies and the catalogs of important libraries such as the Bibliothèque Nationale, the British Museum, and the Library of Congress. Another collection, kept in the Acquisition Division, is most important for lists and directories of periodicals and serials. They are held for staff use in cataloging the books for the collections.