Papers of Helmi Dagmar Mattson (1890-1974) include an autobiography; correspondence; diaries; handwritten and typescript articles, plays, poetry and books; records and papers relating to the Northwestern Finnish Historical Society; minutes of meetings of the Mt. Solo Washington Finnish Club; bylaws of the Finnish Workers Association (Portland, Ore.); miscellany; memorabilia; photographs and photograph albums; and scrapbooks.

Papers of Velma (Hakkila) Doby (1923-2019) consist of materials on Finnish Americans and Finnish American life. Included are newspaper clippings concerning Finnish American scholars and also articles written by e.g. Michael Karni and Carl Ross; clippings concerning Finntowns, notorious Finnish Americans and Finnish Americans in general. Collection contains Velma Doby's thesis including her English translation of an autobiography by the Finnish American poet Helmi Mattson.