S.Res.20 - Resolved, whereas at Vladivostok on November 24, 1974, the President of the United States and the General Secretary of the Central Committee of the Communist Party of the Union of Soviet Socialist Republics reached an agreement in principle on the limitation of strategic offensive nuclear arms.94th Congress (1975-1976)
Cosponsors: S.Res.20 — 94th Congress (1975-1976)All Information (Except Text)
Congress.gov databases include cosponsorship dates (including identification of "original" cosponsors) since 1981 (97th Congress). Prior to 1981, you may be able to find some information online, but often the information is available only in print form.
Sponsor: Sen. Kennedy, Edward M. [D-MA] | Cosponsor statistics: 41 current - includes 0 original