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. From the left: Prof. Jan Żak (Institute of Prehistory,
Adam Mickiewicz University in Poznań),
Lech Krzyżaniak, Ph.D., Prof. Jerzy Topolski (Institute of History,
Adam Mickiewicz University in Poznań).