contract

contract

Letter to the Committee of the Library of Classics of Philosophy written 06.11.1951

Letter to the Committee of the Library of Classics of Philosophy written 18.07.1951

Letter to Tadeusz Kotarbiński written 21.07.1951

Contract with the National Scientific Publishers written 10.12.1954

Letter from Irena Krońska written in 13.07.1954