Geology and land use in eastern Washington County, Pennsylvania

by Kent, Bion H. (Bion Huntley), 1925-
Harrisburg : Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey, 1969

Geology and land use in eastern Washington County, Pennsylvania,

by Kent, Bion H. (Bion Huntley), 1925-
Harrisburg, 1969

Geology and land use in eastern Washington County, Pennsylvania, California and Monongahela 7 1/2-minute quadrangles /

by Schweinfurth, Stanley P.
Harrisburg : Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey, 1971

Geology and land use in eastern Washington County, Pennsylvania,

by Kent, Bion H. (Bion Huntley), 1925-
Harrisburg [Commonwealth of Pennsylvania, State Planning Board, Bureau of Topographic and Geologic Survey] 1969

Geology and land use in eastern Washington County, Pennsylvania, California and Monongahela 7 1/2-minute quadrangles /

Harrisburg, Pa. : Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey, 1973

Geology and land use in eastern Washington County, Pennsylvania, California and Monongahela 7 1/2-minute quadrangles.

by Schweinfurth, Stanley P.
[Harrisburg] Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1971