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Geology and mineral resources of the Butler and Zelienople quadrangles, Pennsylvania

Richardson, G. B. (George Burr), 1872-1949, author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1936. 1936

Geology and mineral resources of the Honeybrook and Phoenixville quadrangles, Pennsylvania

Bascom, F. (Florence), 1862-1945 author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1938. 1938

Geology and mineral resources of the Middletown quadrangle, Pennsylvania

Stose, George Willis, 1869-1960, author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1933. 1933

Mineral resources of Johnstown, Pennsylvania and vicinity

Phalen, W. C. (William Clifton), 1877-1949 author.
Washington, D.C. : Department of the Interior, United States Geological Survey, 1911. 1911

The pictorial sketch-book of Pennsylvania. Or, its scenery, internal improvements, resources, and ag

Bowen, Eli, 1824-
Philadelphia, W.P. Hazard, 1852. 1852

The pictorial sketch-book of Pennsylvania Or, its scenery, internal improvements, resources, and agr

Bowen, Eli, 1824-
Philadelphia : W. Bromwell, 1853. 1970

Report of progress (1st-3rd) in the laboratory of the Survey at Harrisburg.

McCreath, Andrew Smith, 1849-1930.
Harrisburg, Published by the Board of commissioners for the Second geological survey, 1875-1881. 1881

Geology and mineral resources of the Bellefonte quadrangle, Pennsylvania

Butts, Charles, 1863-1946, author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1936. 1936

Mineral resources of the Elders Ridge quadrangle, Pennsylvania

Stone, Ralph W. (Ralph Walter), 1876-1964, author.
Washington, D.C. : Department of the Interior, United States Geological Survey, 1905. 1905