Allentown, Pennsylvania 1920

1920

Salsbury, Lehigh County, Pennsylvania.

1876

Davis, F.A.

1:32k

Allentown, Pennsylvania 1880

1886

George

Allentown East

1964

1:24k

Allentown East

1964

1:24k

Allentown East

1999

1:24k

Allentown East

1964

1:24k

Allentown East

1964

1:24k

Allentown East

1964

1:24k

Grand atlas, division IV, part I, sheet no. XXVII.

1876

Geological Survey of Pennsylvania

1:19k