Items in this subseries primarily consist of correspondence related to the design of a brochure for the Dupont Awards. As the Awards' curator, Riegel was responsible for the Awrds' presentation and outreach.

Government reports in this sub-series are issued often by executive agencies and are oriented around the press, propaganda, and considered regulation thereof. Reports include a discussion by the FCC over the "War of the Worlds Radio Broadcast", A report on Radio Broadcasting for Senator Burton Wheeler, and an agreement of journalistic standards by the Pan-American Congress of Journalists.

Items in this subseries focus on the West German Cultural Exchange program and its impact on its participants. Items of note include samples of questionaires and surveys and maps of parts of West Germany.

Items in this subseries focus on the US in relation to Riegel's travel after World War II. some items of note include maps of San Francisco, CA and Madison, WI, assorted brochures from various city centers, and a couple of sketches.

Items in this subseries consist of letters between Riegel and over 550 correspondents related to Washington and Lee's Journalism program. Letters range in theme from inquiries about the program, job openings for journalism graudates, the Associated Press, the British Library, the American Association of Schools with Departments in Journalism, and others.

Items in this subseries consist of various drafts on sections considered in the development of Riegel's Memoir. Topics range from his trip to the Virgin Islands, to his view of religion, and his year in Hungary after the conclusion of World War II.

Items in this series pertain to Riegel's personal correspondence between himself and colleagues, friends, and family. Some material is related to or mentions his work, but the majority of the material is about his or other people's personal lives, opinions, and thoughts around world events.

Items in this subseries relate to pulbications from various sources refering to communications satellites. Items of note include: a Thesis titled, "Defense Department's usage of Communications Satellites" by Maurice Fliess from West Virginia University, annual COMSAT publications, and a Canadian publication on the ᐊᓂᒃ ("anik" or little brother)satellite by TELESAT.

This subseries consists of general correspondence between Riegel and approximately 160 correspondents on various topics relating to the Public Opinion Quarterly (POQ). Subjects include anticipated articles for the POQ, Events affecting the POQ, and the POQ's structure.