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Courtesy of UC Riverside, California Museum of Photography
http://www.oac.cdlib.org/ark:/13030/kt3g501450/?order=1

Title:

Drilling deep holes for blasting in Portland cement rock. Fogelsville, Pa.

Creator/Contributor:

Not Known
Gifford M. Mast

Date:

[Date not indicated]

Contributing Institution:

UC Riverside, California Museum of Photography