Senate Treaty Documentsfrom the 81st Congress, 1949-present at Congress.gov.
Treaties in ForceElectronic database has a list of treaties and other international agreements of the United States in force through the current year. REFERENCE JX235.9 A33.
United Nations Treaty SeriesMicrofilm, vol. 1-800, Cabinet 38-39; vol. 984- (1975-), Cabinet 24. Volumes 801-1307 (1971-1983) available in print in the Law Library Archives.