Statutes at Large
Digest of Public General Bills and Resolutions
House and Senate Journals
See "History of Bills and Resolutions" sections which givelegislative histories.
A legislative history, with references to the Congressional Record, is provided at the end of the Public Law in its slip form and as republished in the Statutes at Large.
A complete "Legislative History" will comprise several types of documents related to the bill at various stages of its development:
Most pieces of Federal legislation follow the same life cycle: