Porvenir formation (new name)--and other revisions of nomenclature of Mississippian, Pennsylvanian, and lower Permian rocks, southeastern Sangre de Cristo Mountains, New Mexico / by Elmer H. Baltz and Donald A. Myers.
Publication Info.
[Reston, Va.] : United States Department of the Interior, Geological Survey, 1984.
Washington : United States Government Printing Office