Born-Digital or AnalogAnalogTranscriptPostal service. Montana List of territorial post offices, 1864 - 1889. Western Express v.9#3 July 1959 Unnumbered pages. Establishment of first 15 post offices in territory. Western Express v.7#3 July 1957 p.8 First four postoffices in Montana were in Beaverhead County. Montana Motorist v.16 #'7 J1, 1965 P 3CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
Postal service. Montana, [497420]. Denver Public Library Digital Collections, accessed 07/08/2026, https://digital.denverlibrary.org/nodes/view/1578373
