Nature 222, 1133 - 1135 (21 June 1969); doi:10.1038/2221133a0

Early Homo sapiens Remains from the Omo River Region of South-west Ethiopia: Geological Interpretation of Two Pleistocene Hominid Sites in the Lower Omo Basin

KARL W. BUTZER

Departments of Anthropology and Geography, University of Chicago, Illinois.

References

1.	Butzer, K. W., Brown, F. H., and Thurber, D. L., (in the press), Proc. Sixth Panafrican Congr. Prehist., Dakar, 1967 (in the press).
2.	Butzer, K. W., and Thurber, D. L., Nature (this issue, 222, 1138, 1969). | Article | ISI |
3.	Howell, F. C., Nature, 219, 567 (1968). | ISI |
4.	Soil Classification, A Comprehensive System (seventh approximation), 252 (US Department of Agriculture, Soil Survey, Washington, 1960).
5.	Butzer, K. W., Environment and Archeology, an Introduction to Pleistocene Geography, 160 (Methuen, London, 1965).