Regulation No 1 determining the languages to be used by the European Economic Community (OJ 17, 6.10.1958, p. 385/58).
Rialachán Uimh. 1 lena gcinntear na teangacha a úsáidfidh Comhphobal Eacnamaíochta na hEorpa (IO 17, 6.10.1958, lch. 385/58).