Riegel's correspondence in this series is primarily between different awards administrators and judges. Riegel corresponded with approximately 320 different individauls within this subseries. Correspondents of note include Mrs. Dupont, Turner Catledge, and Sol Taishoff.

Riegel's collection of government reports center around the effectiveness in developing and implementing propaganda addressed to the Axis powers and neutral and liberated countries. Reports tend to focus on one aspect of propaganda ranging from understanding the target audiences culture, to forms of counterpropaganda used by enemy forces.

The Principles of Advertising course covered basic elements of advertisements found in mass media sources. Items in this subseries consist of a course syllabus, quizzes, and exams.