Grosvenor, Gilbert. The National Geographic Society and its Magazine. Washington, D.C.: National Geographic Society (Author), 1957

The collection is open for research. Series XVIII, boxes 515 and 517 may only be used under the supervision of a Manuscripts and Archives staff member due to the physical nature of the materials. Original audiovisual materials, as well as preservation and duplicating masters, may not be played. Researchers must consult use copies, or if none exist should contact Access Services. Copies of commercially produced audiovisual materials contained in this collection cannot be made for researcher use outside of the repository.