Stratigraphy and lithocorrelation of the Snowslip Formation (Middle Proterozoic Belt Supergroup), Glacier National Park, Montana / by James W. Whipple and Sue N. Johnson (U.S. Geological Survey bulletin ; 1833)
Stratigraphy and lithocorrelation of the Snowslip Formation (Middle Proterozoic Belt Supergroup), Glacier National Park, Montana / by James W. Whipple and Sue N. Johnson