Items
Creator is exactly
Smith, Philip Sidney
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[E1616DAL], Letter from U.S. Geological Survey, Philip Sidney Smith to Thomas Alva Edison, April 8th, 1916 1916-04-08 -
[MF48BH], Letter from U.S. Geological Survey, Philip Sidney Smith to Thomas Alva Edison, March 19th, 1919 1919-03-19