Author, conservationist, and landscape architect. Manuscripts of some of his books including The National Forests and Timber in Your Life. Typescript drafts, proofs, galleys, outlines, and correspondence are included.

Civil engineer and surveyor. Diaries, surveyor notebooks, letterpress books, correspondence, postcards, terrain profiles, photographs, etc.

Editor, novelist and professor of journalism at the University of Montana. Typescript drafts and related correspondence for several short stories and her novel, The Hanging Tree. Also some family correspondence and photographs. Johnson wrote Liberty Valence and A Man Called Horse, both, like The Hanging Tree, made into motion pictures.

Novelist. Correspondence, scrapbooks, subject files, preliminary drafts of his writings.

Historian, journalist, railroad employee, and collector. Records, notes, correspondence, ledgers, financial accounts, legal papers, land profiles, etc. relating to the building and operation of the Union Pacific, Rock Island, and other railroads.