Ambridge

1960

1:24k

Ambridge

1960

1:24k

Ambridge

1960

1:24k

Ambridge

1953

1:24k

Ambridge

1960

1:24k

Ambridge

1960

1:24k

Ambridge

1960

1:24k

Upper Ohio River and Valley part II, 12 to 31 miles below Pittsburgh ... (with) Economy, Baden.

1877

Hayes, Eli L.

1:32k

Sewickley

1906

1:63k

Sewickley

1908

1:63k