The Stephen Powell Papers (1933-1997) contain research bibliographies, indexes, and notecards for his book, A Gambling Bibliography based on the Collection, University of Nevada, Las Vegas. The collection also contains his unpublished and published manuscripts, as well as gaming pamphlets, articles, and ephemera from 1934-1977. The collection includes gaming bibliographies in foreign languages, university archive guides, catalog records, and acquisition files for research books.

Collection consists of an original manuscript, "Geology and Ore-Deposition at Tonopah, Nevada" by Josiah Edward Spurr (1870-1950) with hand-drawn diagrams, and letters discussing the donation of the manuscript. The manuscript, which was published in the journal Economic Geology in 1915, is a geological description of the Tonopah mining area; the Tonopah Mining Company is mentioned frequently. It is undated, but the publication date suggests it was written approximately 1913-1915.