Congressional Research Reports
Legal Compilation; Statutes and Legislative History, Executive Orders, Regulations, Guidelines and Reports
Making Environmental Law: The Politics of Protecting the Earth
Marion, Nancy E. (2011) - LAW
US GAO Federal Legislative Histories - Environmental Law
Database contains comprehensive legislative histories for major environmental U.S. Public Laws enacted from 1921 to 1995, as compiled by the U.S. Government Accountability Office, including the text of laws, bills, committee reports, Congressional Record documents, transcripts of hearings, and other documents in pdf format.
Yale Law Library Legislative History Guide