Human ancestors / 
With an introduction by glynn Isaac, Richard e. f. leakey 
 - 130 páginas 
 - Readings from Scientific American .
<br/><br/><label>ISBN: </label>0716711001 0-7167-1101-x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Edad de piedra<br/>Evolución humana
<br/><br/><label>LC Class. No.: </label>GN281  / H84