World beneath the sea.
By: Prepared by Special Publications Divison. [Contributing authors: James Dugan and others.]
Contributors: Dugan, James, 1912-1967; National Geographic Society (U.S.). Special Publications Division
Publisher: National Geographic Society
Published: 1967
Place of publication: Washington
Language: eng
Number of pages: 204
Subjects: Underwater exploration
Notes: Bibliography: p. 202