If you aren't aware of the official citation to the statute you are attempting to find or research, but do know its common or popular name (such as the American with Disabilities Act), these resources can help identify the relevant Code sections.
Legislative Bodies
Bills
Congressional Committee Hearings, Reports, & Prints/Publications
Congressional Documents Online from Rutgers Law School Library
Congressional Debates
Statutes at Large
United States Code (U.S.C.)