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Lehigh Valley Railroad - Wikipedia
Lehigh Valley Railroad, " Route Of The Black Diamond - American-Rails.com
Lehigh Valley Railroad Historical Society | History - lvrrhs.org
Lehigh Valley Railroad remembered - Trains
Passenger Trains of the Lehigh Valley Railroad
Lehigh Valley Railroad Historical Society
Lehigh Valley Railroad
The Lehigh Valley Railroad – Bethlehem Area Public Library - BAPL
Lehigh Valley Railroad Company - Britannica Money
Building the Lehigh Valley Railroad