HeinOnline has recently completed its retrospective conversion of the Federal Register from volume 1 (1936) through volume 70 (June 2005). New content will be added as it becomes available.
If you haven’t already discovered HeinOnline, I highly recommend that you take a look. It’s one of the best kept secrets in legal research.
HeinOnline is probably best known for its outstanding collection of law journals, which provides comprehensive coverage from the inception of each publication. In some cases, coverage goes all the way back to the 1800s!
There are also three other major library collections: the aforementioned Federal Register Library, the Treaties and Agreements Library, and the U.S. Supreme Court Library.
HeinOnline is a subscription database, but it is freely available to patrons at many Wisconsin law libraries, including the UW Law Library.