Geology, earthquake hazards, and land use in the Helena area, Montana - a review a review of the earthquake problems at and near the capital of Montana - a first step toward the reduction of earthquake hazards in this rapidly developing region - Schmidt, Robert Georg (U.S. Gov. Print. Off., 1986)
Keywords: Etats-Unis. Montana. Hélène (Region). Géologie; Hélène (Mt) (Etats Unis); Séisme. Etats-Unis. Montana. Hélène (Region); Geologie; Earthquake hazard analysis -- Montana -- Helena Region; Geology -- Montana -- Helena Region; Land use -- Montana -- Helena Region; Erdbebengefahr; Helena Valley