Search Constraints
You searched for:
Subject Topical
Boats and boating--Pennsylvania--Pittsburgh Region--Maps.
Remove constraint Subject Topical: Boats and boating--Pennsylvania--Pittsburgh Region--Maps.
Subject Topical
Dams--Ohio River--Maps.
Remove constraint Subject Topical: Dams--Ohio River--Maps.
Subject Topical
Locks (Hydraulic engineering)--Allegheny River (Pa. and N.Y.)--Maps.
Remove constraint Subject Topical: Locks (Hydraulic engineering)--Allegheny River (Pa. and N.Y.)--Maps.
Subject Topical
Locks (Hydraulic engineering)--Pennsylvania--Pittsburgh Region--Pictorial works.
Remove constraint Subject Topical: Locks (Hydraulic engineering)--Pennsylvania--Pittsburgh Region--Pictorial works.
1 entry found