Fossil collecting in Pennsylvania /

by Hoskins, Donald M., Inners, Jon D., Harper, John A.
Harrisburg, [Pennsylvania] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1988
Third edition, second printing.

Geology and mineral resources of the Berwick quadrangle, Luzerne and Columbia counties, Pennsylvania /

by Inners, Jon D.
Harrisburg : Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978

French Creek State Park, Berks and Chester Counties : Piedmont Rocks and Hopewell Furnace /

[Harrisburg, Pa. : The Bureau], 1996
Rev.

Geology and mineral resources of the Allenwood and Milton quadrangles, Union and Northumberland Counties, Pennsylvania /

by Inners, Jon D.
Harrisburg : Commonwealth of Pennsylvania, Department of Conservation and Natural Resources, Office of Conservation and Engineering Services, Bureau of Topographic and Geologic Survey, 1997

Geology and mineral resources of the Allenwood and Milton quadrangles, Union and Northumberland Counties, Pennsylvania /

by Inners, Jon D.
Harrisburg [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1997

French Creek State Park /

[Harrisburg, Pa.] : The Bureau, 1996
Rev.

Geology and mineral resources of the Allenwood and Milton quadrangles, Union and Northumberland Counties, Pennsylvania /

by Inners, Jon D.
Harrisburg : Pennsylvania Geological Survey, 1997

Military geology of the Richmond and Petersburg National Battlefield Parks, Virginia : guidebook for a Field Trip held in conjunction with the 37th Annual Meeting of the Associatio...

by Inners, Jon D.
Harrisburg, PA : Pennsylvania Geological Survey, 1995

Ricketts Glen State Park, Luzerne, Sullivan, and Columbia counties : the rocks, the glens, and the falls.

by Braun, Duane D.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Conservation and Natural Resources, Office of Conservation and Engineering Services, Bureau of Topographic and Geologic Survey, Office of Parks and Forestry, Bureau of State Parks, 1998
2nd ed.

French Creek State Park /

[Harrisburg, Pa.] : The Bureau, 1996
Rev.

Ricketts Glen State Park, Luzerne, Sullivan, and Columbia counties : the rocks, the glens, and the falls /

by Braun, Duane D.
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey and Office of Parks and Forestry, Bureau of State Parks, 1998
2nd ed.

Geology and mineral resources of the Allenwood and Milton quadrangles, Union and Northumberland Counties, Pennsylvania /

by Inners, Jon D.
Harrisburg [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1997

Fossil collecting in Pennsylvania /

by Hoskins, Donald M.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1983
3rd ed.

Geology and mineral resources of the Berwick quadrangle, Luzerne and Columbia counties, Pennsylvania /

Harrisburg : Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978

Ricketts Glen State Park, Luzerne, Sullivan, and Columbia counties : the rocks, the glens, and the falls /

by Braun, Duane D.
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey and Office of Parks and Forestry, Bureau of State Parks, 1998
2nd ed.

Geology and mineral resources of the Bloomsburg and Mifflinville quadrangles and part of the Catawissa quadrangle, Columbia County, Pennsylvania /

by Inners, Jon D.
Harrisburg : Bureau of Topographic and Geologic Survey, 1981

Geology and mineral resources of the Allenwood and Milton quadrangles, Union and Northumberland Counties, Pennsylvania /

by Inners, Jon D.
Harrisburg : Pennsylvania Geological Survey, 1997

Geology and mineral resources of the Berwick quadrangle, Luzerne and Columbia counties, Pennsylvania /

by Inners, Jon D.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1978

Geology and mineral resources of the Bloomsburg and Mifflinville quadrangles and part of the Catawissa quadrangle, Columbia County, Pennsylvania /

by Inners, Jon D.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1981

Geology and mineral resources of the Ramey and Houtzdale quadrangles, Clearfield and Centre counties, Pennsylvania /

by Glass, Gary B.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1977