Items
Relation is exactly
American Philosophical Society
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[D0933AAP], Letter from Wharton Barker to Thomas Alva Edison, October 15th, 1909 1909-10-15
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[NP070K], Technical Note, Thomas Alva Edison, April 27th, 1906 1906-04-27
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[QD012D1567], Article, Edwin James Houston, Elihu Thomson, November 1st, 1878 1878-11-01
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[X011AB], Speech, Persifor Frazer, April 5th, 1878 1878-04-05
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[X120BAI], Letter from George Frederick Barker to Henry Draper, July 2nd, 1877 1877-07-02