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Steam shovel - Wikipedia
How Steam Shovels Work - HowStuffWorks
Steam Shovels and Dredges - Wentworth Institute of Technology
Wixom Lake Steam Shovel – The historic type O steam shovel
HISTORY OF THE STEAM SHOVEL - IUOE Local 150
Barge Canal Construction Equipment, The Steam Shovel
Old Antique Toys: Sturditoys
Providence Engineering Works - History | VintageMachinery.org
Moving the Earth — Heartland Science
Steam Shovel | Invention & Technology Magazine