File:1925 - Linden Auto Company - 28 Jun MC - Allentown PA.jpg - Wikimedia Commons

1951 - 600 Block of Hamilton Street South Side - Allentown PA - PICRYL - Public Domain Media Search Engine Public Domain Search

The Urban Wilderness

Missouri S&T Magazine, Special Edition 1994 by Missouri S&T Library and Learning Resources

Mc auto hi-res stock photography and images - Alamy

Long & Foster New Home Listings

James J. Buckley – The Trolley Dodger

Mc auto hi-res stock photography and images - Alamy

Robert W. Gibson – The Trolley Dodger

Robert Selle – The Trolley Dodger

Allentown, Pennsylvania, Familypedia