Registros relacionados: National Geographic :
- National Geographic : vol. 194, no. 1, July 1998 /
- National Geographic : vol. 194, no. 2, August 1998 /
- National Geographic : vol. 194, no. 3, September 1998 /
- National Geographic : vol. 194, no. 5, November 1998 /
- National Geographic : vol. 194, no. 6, December 1998 /
- National Geographic : vol. 193, no. 4, April 1998 /