Dymaczewo near Poznań. International Symposium "Origin and Early Development
of Food-producing Cultures in North-Eastern Africa", September 9^th-13^th, 1980.
Opening ceremony. The Symposium proceeds.
From the left: (1) Ann Stemler, Ph.D. (Biology Department,
De Anza College, Cupertino, California, USA);
(2) Lech Krzyżaniak, Ph.D.;
(3) Prof. John Desmond Clark (University of California, Berkeley, USA);
(4) Prof. Peter Shinnie (University of Calgary, Alberta, Canada).