Harrisburg, Williamsport, Erie, Scranton.

1886

Mitchell, Samuel Augustus

Folded Structure. Harrisburg, PA. Geologic Map of Harrisburg, PA.

1966

O'Brien, Emmett J

1:250k

Schuylkill County.

1872

Gray, Ormando Willis; Walling, H. F.

1:300k

Harrisburg, Williamsport, Erie, Scranton.

1890

Mitchell, Samuel Augustus

Harrisburg, Williamsport, Erie, Scranton.

1884

Mitchell, Samuel Augustus Jr.

Plate J. Southeast Pennsylvania.

1871

Hopkins, G.M.

Conoy & West Donegal, Lancaster, Pennsylvania.

1864

Bridgens, H.F.

1:42k

An Historical Map of York County, Pennsylvania.

1932

Tunis, Edwin, 1897-1973

Olmsted Air Force Base : Middletown Pennsylvania

1951

United States. Air Force

1:7k

Profiles of Massachusetts Railroad, Florida Canal...

1834

Tanner, Henry S.