Frank Bohn (1878-1975) was best known as "an advocate of industrial unionism who was a founding member of the Industrial Workers of the World."  Confirmed that this is the same Frank Bohn who edited Boulder Dam: From the Origin of the Idea to the Swing-Johnson Bill." New York: Joint Committee of National Utility Associations, 1927 (in UNLV Spec. Coll. TC557.5.H6 B62x 1927). -- https://en.wikipedia.org/wiki/Frank_Bohn_(socialist)