VOICES REVIVED Ardipithecus kadabba: Late Miocene Evidence from the Middle Awash, Ethiopia by Yohannes Haile-Selassie (Editor), Giday WoldeGabriel (Editor) December 1969 eBook $65.00, £55.00
Homo erectus: Pleistocene Evidence from the Middle Awash, Ethiopia by W. Henry Gilbert (Editor), Berhane Asfaw (Editor) February 2009 Hardcover $85.00, £71.00|eBook $85.00, £71.00