Geology and ground-water resources of the Helena Valley, Montana
By: by Howard W. Lorenz and Frank A. Swenson ; with a section on the chemical quality of the water ; by Herbert A. Swenson ; prepared as part of a Program of the Department of the Interior for Development of the Missouri River Basin
Contributors: Geological Survey (U.S.)
Series: Geological Survey (U.S.). Circular -- 83; Geological Survey circular -- 83.
Publisher: U.S. Department of the Interior, Geological Survey
Published: 1951
Place of publication: Washington, D.C
Language: eng
Number of pages: 68
Subjects: Geology; Groundwater; Hydrogeology; Hydrology