Remembering Professor Aleksander Guterch

A beautifully colored map of Poland and Lithuania by De Vitt, cartographer of Karol Gustav, from 1655, bought in Oslo in 1976 by the advice of Prof. Aleksander Guterch, is a very pleasant memory of 13 years of our close cooperation.I met Prof. Aleksander Guterch in the summer of 1969, after graduating from the Faculty of Mathematics and Physics at the University of Warsaw, with a master's degree in physics of the Earth.Following the advice of Prof. Tadeusz Olczak, I applied for a job at the laboratory of deep lithosphere research by means of deep seismic soundings (DSS) in the Department of Geophysics, Polish Academy of Sciences (PAS).Professor Aleksander Guterch (later AG) just completed his doctorate and was organizing a new laboratory, looking for appropriate candidates