The U.S. Congressional Serial Set is the permanent bound record of Congressional Reports and Documents as well as any Executive Reports and Documents submitted to Congress. The Serial Set also contains miscellaneous reports from quasi-governmental agencies and non-governmental organizations such as, the Boy Scouts of America. Expect a 3 to 5 year time lag before Reports and Documents are published in the Serial Set.
Serial Set volume numbers begin with the year 1817 (15th Congress). Due to the publishing history of the Serial Set, few libraries have a complete set of the bound volumes.
American State Papers
Prior to the Serial Set, the same types of papers are called The American State Papers (ASP). ASP volume numbers begin with zero.
The United States Congressional Serial Set Map Index contains a wide variety of maps on topics as predictable as Armed Forces and Conflicts or Discovery and Exploration to those as unexpected as the Almshouses and Asylums. You can find for example the map titled "Boston in 1880, showing societies (secret and benefit), hospitals, asylums and homes." Maps included date to before 1799. For example if you were studing the Roman Empire you might find interesting a map of the "Main road system of the Roman Empire as shown by the Itinerary of Antonine (A.D. 150) and the Itinerary to Jerusalem (A.D. 333). From Parthey and Pinder."
The individual Documents and Reports are later bound into volumes of the Serial Set, but they were not arranged in numerical order until 1980 (96th Congress).
The University of Delaware Library has an extensive collection of bound Serial Set volumes.
Volumes from the 1980s to present are located on the Lower Level of the Morris Library. Older volumes are located in the Library Annex.
* Or use the Congressional Serial Set database!