PAN

PAN

Letter to the Polish Academy of Science written 01.07.1963

Letter to the Polish Academy of Science written 19.10.1963

Protocol from the meeting of the PPS Board 12.05.1957

Letter to Irena Krońska written in 19.01.1955

Letter from Stefan Żółkiewski written in n.d.

Letter to Władysław Tatarkiewicz written 17.10.1963

Letter from Stefan Żółkiewski written in 29.05.1967

Letter from Stefan Żółkiewski written in 25.11.1967

Letter to Władysław Tatarkiewicz written 10.05.1963

Letter from Stefan Żółkiewski written in 12.02.1966

Letter to the Polish Academy of Science written 28.04.1964

Letter to the Polish Academy of Science written 05.03.1969