Great resource. Thanks for this find!
Cleveland fortunately still has some steel mills, and what it has lost has largely been replaced by new uses (we can debate the value of them). But what I want to see are pre-1977 aerials of Youngstown where little or nothing has replaced its 20 linear miles of demolished steel miles.
Unfortunately, I don't see historic aerials of Youngstown. But I'm having fun looking up aerials of places I've lived before those neighborhoods and subdivisions were built.