New theories in physics [microform] : Conference organized in collaboration with the International union of physics and the Polish intellectual co-operation committee, Warsaw, May 30th-June 3rd, 1938.
Physics.
Quantum theory.
International Union of Pure and Applied Physics.
International Institute of Intellectual Co-operation.
League of Nations.
Polska komisja mie dzynarodowej wsp lpracy intelektualnej przy Lidze narod w, Warsaw.