Holm, D., & Schneider, D. (2002). 40Ar/39Ar Evidence for ca. 1800 Ma Tectonothermal Activity along the Great Falls Tectonic Zone, Central Montana (1–). Canadian Science Publishing. https://doi.org/10.1139/e02-069
Holm, Daniel, and David Schneider. 2002. “40Ar/39Ar/Evidence/for/Ca./1800/Ma/Tectonothermal/Activity/Along/the/Great/Falls/Tectonic/Zone,/Central/Montana”. Canadian Science Publishing. https://doi.org/10.1139/e02-069.
Holm, Daniel, and David Schneider. 40Ar/39Ar/Evidence/for/Ca./1800/Ma/Tectonothermal/Activity/Along/the/Great/Falls/Tectonic/Zone,/Central/Montana. Canadian Science Publishing, 1 Jan. 2002, https://doi.org/10.1139/e02-069.