Títulos similares: National Geographic :
- National Geographic : vol. 181, no. 2, February 1992 /
- National Geographic : vol. 181, no. 3, March 1992 /
- National Geographic : vol. 181, no. 4, April 1992 /
- National Geographic : vol. 181, no. 5, May 1992 /
- National Geographic : vol. 181, no. 1, January 1992 /
- National Geographic : vol. 182, no. 6, December 1992 /