NATIONAL GEOGRAPHIC, June 1999 issue, featuring astronaut John Glenn. The cover is slightly creased but otherwise in good condition. February 1998 issue, challenging the uncharted peaks of Antarctica. Includes supplement. There are tears on the front and back covers, but the inside is clean. Both issues feature a special on the Sahara. These are from a private home collection and show age-related deterioration. Please check the images for details.