Items
Relation is exactly
U.S. Naval Observatory
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[E1141BL], Letter from William Walter Dinwiddie to Thomas Alva Edison, November 13th, 1911 1911-11-13 -
[E1163CE], Letter from William Walter Dinwiddie to Thomas Alva Edison, December 14th, 1911 1911-12-14
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[E1924AA], Letter from William Henry Meadowcroft to Walter Seeley Mallory, January 20th, 1919 1919-01-20