National register of Microform masters. - Washington : Library of Congress, 1972. - 1076 p. ; 28 cm. - The library of congress catalogs. . 313 313 ISBN: 0-8444-0043-2 Subjects--Corporate Names: UNESCO. Subjects--Topical Terms: Bibliographies and catalogs.--America. Dewey Class. No.: 011 / L616n