The College of Wooster provides several online lists to help identify agency publications such as annual reports which were included in the Serial Set.
ProQuest Congressional (1789+) - Indexing from 1969 forward includes descriptive abstracts and links to some online full text. Entries prior to 1969 only list the title and a few descriptive subject terms.
CIS U.S. Serial Set Index (1789-1969) - shelved next to the U.S. Documents microfiche. Includes:
Numerical Lists & Schedule of Volumes - shelved next to the U.S. Documents microfiche:
Schedule of Volumes, 1970 to Current (Law Librarians' Society of Washington, D.C.)
Assigned Serial Numbers Not Used (Admin Notes Technical Supplement, November 30, 1998, GP 3.16/3-3:5/11)