National Geographic Magazine July-Dec 1997 with Slipcase

National Geographic World October 1995 -Celebrating 20 years

National Geographic July 1997 Robot Revolution Roman Empire Japanese Sumo

National Geographic World November 1995

National Geographic Robot Revolution July 1997 Vol 192, No. 1

National Geographic July 1997 Map Great Peoples of Past The Romans+Roman Empire

National Geographic Magazine Robot Revolution July 1997

NATIONAL GEOGRAPHIC July 1997 ROBOT REVOLUTION Roman Empire SUMO Grand Canyon