Volcanic rocks of Oligocene age in the southern part of the Madison Range, Montana and Idaho. (In: Geological Survey research 1962, Short Papers in geology, hydrology and topography. Articles 1-59)
Reference:
Hamilton,W. et al. (1962)
Volcanic rocks of Oligocene age in the southern part of the Madison Range, Montana and Idaho. (In: Geological Survey research 1962, Short Papers in geology, hydrology and topography. Articles 1-59) United States Geological Survey, Professional Paper
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