Tools and human evolution / Sherwood L. Washburn -- The early relatives of man ; Ramapithecus / Elwyn L. Simons -- The evolution of the hand ; The antiquity of human walking / John Napier -- The Hominids of East Turkana / Alan Walker and Richard E. F. Leakey -- The casts of fossil Hominid brains / Ralph L. Holloway -- Homo erectus / William W. Howells -- Stone tools and human behavior / Sally R. Binford and Lewis R. Binford --The functions of paleolithic flint tools / Lawrence H. Keeley -- The food- sharing behavior of protohuman Hominids / Glynn Isaac.