W. Flux, Alfred. 1937. “INTERNATIONAL TRADE IN CERTAIN RAW MATERIALS AND FOODSTUFFS BY COUNTRIES OF ORIGIN AND CONSUMPTION, 1935. League of Nations, Genéve, 1936. 146 S”. Nationaløkonomisk Tidsskrift 3 (januar). https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/59959.