The Maurine and Fred Wilson Papers (1888-1991) contain family papers and the historical research of Fred Wilson. It includes correspondence between Maurine and Fred Wilson, as well as Maurine Wilson’s diaries, calendars, and materials related to her career as a music teacher. The collection also contains Fred Wilson’s research files about the history of Southern Nevada as well as the First Methodist Church in Las Vegas, Nevada.

The Chester R. Longwell Professional Papers (1886-1974) document Longwell's professional career as a geologist and his pioneering field work in Clark County, Nevada. Included are Longwell's field notes; manuscripts, articles and speeches related to geology; personal and business correspondence; professional publications; subject and name files; specimen tags; photographic prints, negatives, and slides; and geological and topographical maps, primarily of Nevada, California, Arizona, and Utah.