Verlag: U.S. Geological Survey, Department of the Interior, Washington D.C.
Zustand: Good. Washington: U.S. Geological Survey, Department of the Interior, 1964. Presumed 1st. 4to. iii,48pp. Illus., maps + 3 maps in back pocket. Good book. (geology, Montana, stratigraphic, Cretaceous Geologic Period) Inquire if you need further information.