The Stratigraphy of the Montana group : with special Reference to the Position and Age of the Judith River Formation in North - Central Montana with special Reference to the Positi...

by Bowen, C. F
Published 1915

Gradations from Continental to Marine Conditions of Deposition in Central Montana During the Eagle and Judith River Epochs Gradations from Continental to Marine Conditions of Depos...

by Bowen, C. F
Published 1919