The first accession (A10-92) is divided into two series. They include published articles and manuscripts, and photographs. The photograph collection consists of 22,719 slides, 3157 photographs, 3209 negatives, 2 compact discs, and 1 VHS video cassette.

The second accession (A11-68) is divided into 9 series. They include biographical information and field journals, published articles and manuscripts, teaching notes, correspondence, research materials, oversize materials, photographs, audiotapes, and maps. The photograph collection consists of 343 photographs, 99 negatives, 2 films, 30 compact discs, 41 VHS video cassettes, 2 Beta cassettes, and 15 DVDs. The tape collection consists of 13 audio cassettes. The map collection consists of 2 maps.

The third accession (A14-40) is comprised of 7 series. The first series comprises a photograph collection containing 2689 photos , 1503 negatives, 23 contact sheets, 6 sketches. The second series is a slide collection containing 6450 slides. 21 videocassettes comprise the third series. Series four contains biographical and family information. Series five is comprised of articles written by Riewe & Oakes. Series six consists of course notes and research material. The final oversize series contains Riewe's academic degrees.