Sources list for PREHISTORIC PERIOD

Schoeninger, M.J. 1989. Reconstructing prehistoric human diet. In T.D. Price (ed.) The Chemistry of Prehistoric Human Bone: 38-67. Cambridge: Cambridge University Press.
Stable Isotopes in Archaeology

Berenquer, Magin. Prehistoric Cave Art in Northern Spain Asturias. Mexico City: Frente de Afirmacion Hispanista, 1994.
Prehistoric Cave Art

Author not available. "Prehistoric and early Greek art" Greek Art. 2000. The Metropolitan Museum of Art, New York. November 10, 2003. http://www.metmuseum.org/explore/publications/pdfs/greek/divided/f-Greek-Art.pdf
Classic Greek Sculpture

Ambrose, S. H. & L. Norr. 1993. Experimental evidence for the relationship of the carbon isotope ratios of whole diet and dietary protein to those of bone llagen and carbonate. In J.B. Lambert & G. Grupe (eds.). Prehistoric Human Bone: Archaeology at the
Stable Isotopes in Archaeology

Professor Robert Beard at Bucknell University, "The Soviet Period 1917-1991," Chronology of Russian History: Soviet Period, 4 September 1999, <http://www.departments.bucknell.edu/russian/chrono3.html> (15 December 2002).
Josef Stalin and the Birth of Soviet Russia