W. FLUX, A. INTERNATIONAL TRADE IN CERTAIN RAW MATERIALS AND FOODSTUFFS BY COUNTRIES OF ORIGIN AND CONSUMPTION, 1935. League of Nations, Genéve, 1936. 146 S. Nationaløkonomisk Tidsskrift, [S. l.], v. 3, 1937. Disponível em: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/59959. Acesso em: 16 feb. 2025.