Bradford

1980

1:100k

Geological map McKean County, and a map of a portion of Cattaraugus County, New York to exhibit the horse-shoe bend in the Allegheny River.

1879

Geological Survey of Pennsylvania

1:95k

Bradford Or Northern Oil Region

1878

Opperman, J.

1:63k

Smethport

1933

1:63k

Bradford

1941

1:63k

Bradford

1924

1:63k

Smethport

1937

1:63k

Bradford

1926

1:63k

Bradford

1926

1:63k

Smethport

1937

1:63k