Survey of helium in natural water wells and springs in southwest Montana and vicinity
Subtitle: Part II, July 1-Dec. 31, 1979
By: by W.P. Doering and Irving Friedman ; United States Department of the Interior, Geological Survey
Contributors: Friedman, Irving, 1920-; Geological Survey (U.S.)
Series: Open-file report -- 80-1257; Open-file report (Geological Survey (U.S.)) -- 80-1257
Publisher: The Survey
Published: 1980
Place of publication: [Reston, Va.?]
Language: eng
Format: Microform
Subjects: Helium -- Montana; Earthquakes
Notes: Microfiche. [Denver, Colo. : U.S. Geological Survey, 1981?]. 1 microfiche ; 11 x 15 cm

Bibliography: p. 4