Born-Digital or AnalogAnalogTranscriptArtists. Kuhler, Otto Autobiography, part I. National Railway Historical Society Bulletin.v.39 #1 1974 p.6-11 Autobiography, part II. National Railway Historical Society Bulletin v.39 #1 1974 p.12,22-24 Monorail system suggested in 1967 for Denver by Otto Kuhler. National Railway Historical Society Bulletin v.39 #1 1974 p.16-21 Etching as an art; Kuhler explains the process. Post Empire S 22, 1974 p.40-41CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng