Coal resources of Beaver County, Pennsylvania /
Patterson, E. D.(Elmer Davisson)
Pennsylvania.Bureau of Topographic and Geologic Survey.
Geological Survey (U.S.)
Washington [D.C.] : U.S. G.P.O.,
1963.
Five folded plates in pocket.
"Prepared in cooperation with the Pennsylvania Bureau of Topographic and Geologic Survey."
Includes bibliographical references (p. A32-A33).
Coal