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Courtesy of Fresno County Public Library
http://www.oac.cdlib.org/ark:/13030/c8mp522m/?order=1
Title:
Crowd gathered at Weir Portal to watch the switch pull for the last blast to connect Weir and Black Rock Tunnel
Creator/Contributor:
Claude C. ""Pop"" Laval
Date:
October 1, 1926
Contributing Institution:
Fresno County Public Library