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

1966

O'Brien, Emmett J

1:250k

Harrisburg, Williamsport, Erie, Scranton.

1890

Mitchell, Samuel Augustus

Harrisburg, Williamsport, Erie, Scranton.

1884

Mitchell, Samuel Augustus Jr.

Harrisburg, Williamsport, Erie, Scranton.

1886

Mitchell, Samuel Augustus

Harrisburg (Pennsylvania).

1929

Nirenstein, Nathan

1:1k

Business Section, City of Harrisburg (Pennsylvania).

1950

Nirenstein, Nathan

1:720

An Historical Map of York County, Pennsylvania.

1932

Tunis, Edwin, 1897-1973

Cumberland, Franklin, Adams counties.

1872

Gray, Ormando Willis; Walling, H. F.

1:300k

Schuylkill County.

1872

Gray, Ormando Willis; Walling, H. F.

1:300k

Profiles of Massachusetts Railroad, Florida Canal...

1834

Tanner, Henry S.