Changes in stratigraphic nomenclature by the U.S. Geological Survey, 1975 /
Cohee, George Vincent,1907-
Wright, W. B.(Wilna B.)
Geological Survey (U.S.)
United States.Government Printing Office.
Washington : U.S. Govt. Print. Off.,
1976.
Bibliography: p. 74-84.
Geology, Stratigraphic