International Scientific Cooperation Office

International Scientific Cooperation Office

Letter to the Polish Academy of Science written 22.09.1964

Letter to the Polish Academy of Science written 04.10.1964

Letter to the Polish Academy of Science written 05.03.1969

Letter to the Polish Academy of Science written 11.03.1965

Letter to the Polish Academy of Science written 22.04.1965

Letter to the Polish Academy of Science written 22.12.1965

Letter to the Polish Academy of Science written 15.09.1964