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The United States Statutes at Large, commonly referred to as the Statutes at Large, is the official source for the laws and resolutions passed by Congress.
United States. (1845). U.S. statutes at large: Vols. 1-18 (1789-1875). Washington, D.C.: U.S. G.P.O
United States. (1848). U.S. statutes at large: Vols. 65-125 (1951-2011). Washington, D.C.: U.S. G.P.O.
"Congressional bills are legislative proposals from the House of Representatives and Senate within the United States Congress. There are eight different types of bills..." [More] for a list of bills.
Check out Congress.gov for a more easily searchable site...