Treaties are indexed chronologically and by subject. United Nations Treaty Series. Recueil des Traites. United Nations, 1947- date. This series contains treaties and international agreements entered into by any member of the United Nations.
Treaties appear in their official language as well as English and French.
International Legal Materials. American Society of International Law, 1962-date. This bimonthly periodical contains the texts of major treaties and drafts of proposed treaties. An excellent source for recent treaties before they become available in other publications. The recent actions regarding treaties sections from January,1980 to the present are available on Lexis.