Dawn of humans.
Washington, D.C. :  National Geographic Society, 
1997.
Contents: Four million years ago: hominids take a stand [Africa] -- Olduvai Gorge: source for prehistory -- 125,000 years ago: exploiting a climate of opportunity [main map] -- 65,000 years ago: Ice Age routes to new homes -- Today: prospecting for hominids.
Supplement to National Geographic, February 1997.