Poznań, Collegium Novum, Instytute of Prehistory,
 
                    Adam Mickiewicz University (UAM), March 1983.
 Celebration of the 60th birthday of Prof. Jan Żak
 (director of the Institute of Prehistory, Adam Mickiewicz University in Poznań). 
                    From the left: (1) Lech Krzyżaniak, Ph.D.; 
(2) Stanisław Jasnosz, 
                    Ph.D. (Poznań Archaeological Museum); 
(3) Janina Effertowa, 
                    MA (Institute of Prehistory, UAM - librarian);
 (4) doc. Michał 
                    Kobusiewicz (head of the Department of Archaeology of Greater 
                    Poland 
and Pomerania, Institute of History of Material Culture, 
                    Polish Academy of Sciences);
 (5) Piotr Chachlikowski, MA (Institute 
                    of Prehistory, UAM);
 (6) Aleksander Ko¶ko, Ph.D. (Institute 
                    of Prehistory, UAM);
 (7) Józef Bednarczyk, MA (Institute of 
                    Prehistory, UAM); 
(8) Hanna Kóčka-Krenz, Ph.D. (Institute 
                    of Prehistory, UAM); 
(9) Ludwik Fijał (Institute of Prehistory, 
                    UAM - draftsman).