Laws are bound together in a publication named Statutes at Large. They have citations that look like:
Both formats refer to the same law, in this case the No Child Left Behind Act of 2001. It is easiest to use the second format, 115 Stat. 1425, to find the law.
Note - before 1957 each law was called a "chapter". A citation would like: Tennessee Valley Authority Act, ch. 32, 48 Stat. 58 (1933).
Statutes at Large is available in the Governement Documents section in the Rivera Library. They are also available online: