The United States Congressional Serial Set contains House and Senate Documents and House and Senate Reports. The reports are usually from congressional committees dealing with proposed legislation and issues under investigation.
The U.S. Congressional Serial Set is an incomparably rich, yet largely untapped collection of primary source material detailing all aspects of American history containing 13,384 volumes printed in 14,708 books and more than 10.4 million pages from the original 355,081 publications, along with approximately 67,000 maps and thousands of illustrations and statistical tables. Documents cover a wide variety of topics and may include reports of executive departments and independent organizations, reports of special investigations made for Congress, and annual reports of non-governmental organizations.