Geology and mineral resources of the Montoursville south and Muncy quadrangles and part of the Hughesville quadrangle, Lycoming, Northumberland, and Montour counties, Pennsylvania...

by Faill, Rodger T.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources,Bureau of Topographic and Geologic Survey, 1979

Bedrock geology and mineral resources of the Linden and Williamsport quadrangles, Lycoming County, Pennsylvania /

by Faill, Rodger T.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977

Geology and mineral resources of the Salladasburg and Cogan Station quadrangles, Lycoming County, Pennsylvania /

by Faill, Rodger T.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977

Geology and mineral resources of the Salladasburg and Cogan Station quadrangles, Lycoming County, Pennsylvania /

by Faill, Rodger T.
Harrisburg : Commenwealth of Pennsylvania, Dept. Environmental Resources, Bureau of tpographic Geologic Survey, 1977

Geology an mineral resources of the Linden and Williamsport Quadrangles, Lycoming County, Pennsylvania /

by Faill, Rodger T.
Harrisburg : Commenwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1977

Bedrock geology and mineral resources of the Salladasburg and Cogan Station quadrangles, Lycoming County, Pennsylvania /

by Faill, Rodger T.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1977

Bedrock geology and mineral resources of the Salladasburg and Cogan Station quadrangles, Lycoming County, Pennsylvania

by Faill, Rodger T.
Harrisburg [Pennsylvania Topographic and Geologic Survey], 1977

Bedrock geology and mineral resources of the Linden and Williamsport Quadrangles, Lycoming County, Pennsylvania /

by Faill, Rodger T.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1977

Geology and mineral resources of the Montoursville South and Muncy quadrangles and part of the Hughesville quadrangle, Lycoming, Northumberand, and Montour Counties, Pennsylvania /

by Faill, Rodger T.
Harrisburg, Pa. : Commonwealth of Pennsylvania, Dept of Environmental Resources, Bureau of Topographic and Geologic Survey, 1979

Bedrock geology and mineral resources of the Linden and Williamsport quadrangles, Lycoming County, Pennsylvania /

by Faill, Rodger T.
Harrisburg : Pennsylvania Geological Survey, 1977

Geology and mineral resources of the Salladasburg and Cogan Station quadrangles, Lycoming County, Pennsylvania /

by Faill, Rodger T.
Harrisburg : Pennsylvania Geological Survey, 1977