Items
Relation is exactly
Telegraph and Telephone Age
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[E1727BC], Letter from Horace Leslie Hotchkiss to Thomas Alva Edison, October 23rd, 1917 1917-10-23 -
[E1727BE], Letter from Horace Leslie Hotchkiss to William Henry Meadowcroft, October 30th, 1917 1917-10-30
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[E1731AA2], List, William Henry Meadowcroft, April 1917 1917-04-00
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[E1861AT], Letter from Thomas Alva Edison to William Henry Meadowcroft, November 1918 1918-11-00