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Relation is exactly
Thomson, Joseph John
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[E1572AD], Letter from Scudder Klyce to Thomas Alva Edison, July 5th, 1915 1915-07-05 -
[NA279AAA] Technical Note, 1917-1918 1917-1918
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[SB512099A1], Article, Waldemar Bernhard Kaempffert, July 1915 1915-07-00