Environment and Behavior of 2.5-Million-Year-Old Bouri Hominids de Heinzelin, Jean ; Desmond Clark, J. ; White, Tim ; Hart, William ; Renne, Paul ; Woldegabriel, Giday ; Beyene, Yonas ; Vrba, Elisabeth Abstract Publication: Science Pub Date: April 1999 Bibcode: 1999Sci...284..625D