Emsworth

1993

1:24k

Emsworth

1960

1:24k

Emsworth

1960

1:24k

Emsworth

1960

1:24k

Emsworth

1960

1:24k

Emsworth

1960

1:24k

Emsworth

1953

1:24k

Upper Ohio River and Valley part I from Pittsburgh ... (with) Middletown, Riverside, Allegheny Co., Pa.

1877

Hayes, Eli L.

1:32k

Map of Pittsburgh : showing the location of its furnaces, rolling mills & steel works

1879

1:34k

No.1-2: Map Of The Ohio River

1881

Moser, C.

1:48k