I-IV -- General Editor's Preface -- Introduction -- Amino Acid Dating of Pleistocene Fossil Materials: Olduvai Gorge, Tanzania -- A Hand-Ax from Northwest Iran: The Question of Human Movement Between Africa and Asia in the Lower Paleolithic Period -- COMMENT -- Mousterian Worked Bone from Cueva Morin (Santander, Spain): A Preliminary Description -- A Technique for Studying Microscopic Wear on Artifact Surfaces -- The Analysis of Some Occupation Floor Distributions from Earlier and Middle Paleolithic Sites in Spain -- Late and Post-Pleistocene Industries and Fauna from the Cave Site of La Riera (Province of Asturias, Spain) -- The Sebilian of the Nile Valley: Some New Concepts -- Notes Toward a Systematization of the Upper Paleolithic in Palestine -- The Upper Paleolithic in North-Central Eurasia: Evidence and Problems -- Man in the Italian Alps: A Study of the Pleistocene and Post-Glacial evidence -- Mesolithic Coastal Economies in the Levant and North Africa -- Late Cenozoic Climate, Mammalian Evolutionary Patterns and Middle Pleistocene Human Adaptation in Eastern Asia -- Biographical Notes -- Index of Names -- Index of Subjects