Cologne (Germany), September 1990. Research meeting.
From the left: (1) Lech Krzyżaniak, Ph.D;
(2) Michał Kobusiewicz, Ph.D. (head of the Department of Archaeology of Greater Poland
and Pomerania in Poznań, Institute of History of Material Culture,
Polish Academy of Sciences);
(3) Pierre M. Vermeersch (Katholieke Universiteit te Leuven, Belgium).