H.R.8560 - A bill to provide procedures for calling constitutional conventions for proposing amendments to the Constitution of the United States, on application of the legislatures of two-thirds of the States, pursuant to article V of the Constitution.95th Congress (1977-1978)
Cosponsors: H.R.8560 — 95th Congress (1977-1978)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: Rep. Hyde, Henry J. [R-IL-6] | Cosponsor statistics: 4 current - includes 0 original