Born-Digital or AnalogAnalogTranscriptAugust P. Gumlick tunnel Will be holed through Thursday. Post Mr 7, 1939 p.3 Denver water tunnel holed through. Post Mr 9, 1939 p.1 Picture of eastern portal. Post My 20, 1940 p.11 0CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
August P. Gumlick tunnel, [185189]. Denver Public Library Digital Collections, accessed 10/07/2025, https://digital.denverlibrary.org/nodes/view/1529327
