Lignende værker: National Geographic :
- National Geographic : vol. 192, no. 2, August 1997 /
- National Geographic : vol. 192, no. 3, September 1997 /
- National Geographic : vol. 192, no. 4, October 1997 /
- National Geographic : vol. 192, no. 5, November 1997 /
- National Geographic : vol. 192, no. 6, December 1997 /
- National Geographic : vol. 191, no. 1, January 1997 /