Third Petition of the Mayors of the wateringplaces Karlsbad, Marienbad, Franzensbad, Teplitz-Schönau, Joachimsthal and Johannisbad in Czechoslovakia, addresed to the Council of the League of Nations by reason of the threatening violation of the treaty of St. Germain-en-Laye of September 10th 1919, concerning the protection of minorities, by a projected law for watering places