U. V, . «Ministry for Foreign Affairs, Helsinki. Protection of Minority Rights in Finland. Finnish Features. No. 4 65; Aspects of the Language Problem; In Finland. F. F. No. 4 62; Karl Nickul: "The Lapps the People of Lapland". F. F. 33 62; Paavo Ravila: “The Riddle of the Lapps” F. F. 12 61». Revista Mexicana De Sociologí­a, vol. 28, n.º 4, octubre de 1966, pp. 964-6, doi:10.22201/iis.01882503p.1966.4.58680.