Continued by:
*Research & exploration
Alternative title: National geographic research and exploration","National geographic research & exploration","Research and exploration
Corp./Body Author: National Geographic Society (U.S.)
ISSN: 1056-800X
ISSN-L: 1056800X
Cumulative holding: 1991-1993;
Corp./Body Author: National Geographic Society
ISSN: 0077-4626
ISSN-L: 00774626
Cumulative holding: 1954-1974; 1976-1983.