Quade, Jay Paleoenvironments of the earliest stone toolmakers, Gona, Ethiopia - Boulder, CO Geological Society of America November-December 2004 - pp. 1529-1544 ilus., tbls. Subjects--Topical Terms: ARTEFACTOS DE PIEDRAHOMINIDOSISOTOPOS DE CARBONOPALEOAMBIENTESSEDIMENTOLOGIA Subjects--Geographic Terms: ETIOPIAGONA