These papers were gathered by Oscar Hahn during his tenure at the University of Iowa. He donated them to the University when he retired in 2008.

This collection consists of three series. The first of these is comprised of compositions by Hahn, listed by the name of the poem or essay, followed by the publication in which it appeared. The second series is comprised of materials about Hahn. This includes newspaper and magazine clippings, which mostly contain criticism, reviews, and interviews, but also includes personal interest stories, announcements of readings, posters, conference schedules and the like. It also includes printouts of web pages. These ephemeral items are so numerous, and in many cases, so short, that the decision was made not to include them in the finding aid; however, interviews and criticism appearing in trade journals were photocopied and these are included in the finding aid. Series I and II are arranged chronologically. The third series is Miscellaneous, where are kept such things as his passport application with photograph, biographical material, correspondence, and photographs.

The bulk of these papers are in Spanish.