Lawrence, Mercer, Beaver, Butler counties.

1872

Gray, Ormando Willis; Walling, H. F.

1:300k

Pittsburgh.

1924

Rand McNally and Company

1:380k

Counties of Columbiana, Jefferson, Carroll, and Harrison

1868

Lloyd, H.H.

1:300k

Plate D. West Central Pennsylvania.

1871

Hopkins, G.M.

Pennsylvania.

1912

Rand McNally and Company

1:380k

Big Beaver Township, Beaver County, PA.

1876

Caldwell, Joseph A.

Business Section, City of New Castle (Pennsylvania).

1950

Nirenstein, Nathan

1:636

Greater Pittsburgh Airport : Coraopolis, Pennsylvania : Vicinity map

1951

United States. Air Force

1:500k

Youngstown Municipal Airport: Youngstown Ohio : Vicinity map

1952

United States. Air Force

1:500k

Pennsylvania (western part).

1948

Hammond, C.S.

1:585k