Types of materials include correspondence, reports, committee materials, speeches, lectures, reference files, articles, papers, notes, research notes, grant reports, site visits, and presentations. Also included are works authored by Yount, Thomas Kunkle, Edward L. Beckman, C. V. Paganelli and Chick M. Yeung. Materials range in date from 1862 to 2000, with the bulk of materials dating from 1975 to 2000.