Noble, L. F. (Levi Fatzinger), 1882-1965.
A section of the Paleozoic formations of the Grand Canyon at the Bass Trail / by L. F. Noble.
Washington : U.S. G.P.O., 1922.
Includes bibliographical references.
Geology -- Arizona -- Grand Canyon.
Geology, Stratigraphic -- Paleozoic.
Grand Canyon (Ariz.)
Geological Survey (U.S.)
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