Geology and mineral resources of the Sinking Spring quadrangle, Berks and Lancaster counties, Pennsylvania /

by MacLachlan, David B.
Harrisburg [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1975

Geology and mineral resources of the Temple and Fleetwood quadrangles, Berks county, Pennsylvania /

by MacLachlan, David B.
Harrisburg : Commonwealth of Pennsylvania Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1979

Geologic map of the Reading and Birdsboro quadrangles, Berks County, Pennsylvania /

by MacLachlan, David B.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1983

Structure and stratigraphy of the limestones and dolomites of Dauphin County, Pennsylvania,

by MacLachlan, David B.
Harrisburg [Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey] 1967

Geology and mineral resources of the Sinking Spring quadrangle, Berks and Lancaster counties, Pennsylvania /

by MacLachlan, David B.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1975

Geology and mineral resources of the Sinking Spring quadrangle, Berks and Lancaster Counties, Pennslyvania /

by MacLachlan, David B.
Harrisburg [Pennsylvania Topographic and Geologic Survey], 1975

Comparative tectonics and stratigraphy of the Cumberland and Lebanon valleys,

by MacLachlan, David B.
Harrisburg, Pa., Bureau of Topographic and Geologic Survey, Dept. of Internal Affairs, 1966

Geology and mineral resources of the Temple and Fleetwood quadrangles, Berks County, Pennsylvania.

by MacLachlan, David B.
Harrisburg [Pennsylvania Topographic and Geologic Survey], 1979

Structure and stratigraphy of the limestones and dolomites of Dauphin County, Pennsylvania /

by MacLachlan, David B.
Harrisburg, [publisher not identified], 1967

Structure and stratigraphy of the limestones and dolomites of Dauphin County, Pennsylvania /

by MacLachlan, David B.
Harrisburg : Pennsylvania Topographic and Geologic Survey, 1967

Bedrock geology of the Freeburg 7-1/2ʹ quadrangle, Snyder County, Pennsylvania

by MacLachlan, David B.
Harrisburg : Pennsylvania Geological Survey, 1995

Geology and mineral resources of the Temple and Fleetwood quadrangles, Berks county, Pennsylvania /

by MacLachlan, David B.
Harrisburg : Pennsylvania Department of Environmental Resources, 1979

Structure and stratigraphy of the limestones and dolomites of Dauphin County, Pennsylvania /

by MacLachlan, David B.
Harrisburg : Bureau of Topographic and Geologic Survey ; 1967

Geology and mineral resources of the Temple and Fleetwood quadrangles, Berks County, Pennsylvania /

by MacLachlan, David B.
Harrisburg, Pa. : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1979

Geology and mineral resources of the Temple and Fleetwood quadrangles, Berks County, Pennsylvania /

by MacLachlan, David B.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1979

Structure and stratigraphy of the limestones and dolomites of Dauphin County, Pennsylvania /

by MacLachlan, David B.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geological Survey, 1967

Geology and mineral resources of the Reading and Birdsboro quadrangles, Berks County, Pennsylvania /

by MacLachlan, David B.
Harrisburg [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1983

Geology and mineral resources of the Reading and Birdsboro quadrangles, Berks County, Pennsylvania /

by MacLachlan, David B.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1983

Geology and mineral resources of the Reading and Birdsboro quadrangles, Berks County, Pennsylvania /

by MacLachlan, David B.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Office of Resources Management, Bureau of Topographic and Geologic Survey, 1983

Structure and stratigraphy of the limestones and dolomites of Dauphin County, Pennsylvania,

by MacLachlan, David B.
Harrisburg, 1967