travel costs

travel costs

Letter from Tadeusz Czeżowski written 01.06.1950

Letter to the Polish Academy of Science written 04.06.1966

Letter from Konstanty Michalski written 20.12.1937

Letter to the Polish Academy of Science written 01.07.1963

Letter from Stefan Żółkiewski written in 13.12.1966

Letter from Konstanty Michalski written 09.02.1939