Схожі ресурси: National Geographic :
- National Geographic : vol. 175, no. 2, February 1989 /
- National Geographic : vol. 175, no. 3, March 1989 /
- National Geographic : vol. 175, no. 4, April 1989 /
- National Geographic : vol. 175, no. 5, May 1989 /
- National Geographic : vol. 175, no. 1, January 1989 /
- National Geographic : vol. 176, no. 6, December 1989 /