Senders: Electrical World
- Thomas C. Martin for Electrical World to SLC, 11 August 1908 · New York, N.Y. · UCLC37972 CU-MARK
- Thomas C. Martin for Electrical World to SLC and Isabel V. Lyon, 8 September 1908 · New York, N.Y. · UCLC38024 CU-MARK
- Thomas C. Martin for Electrical World to SLC and Isabel V. Lyon, 16 December 1908 · New York, N.Y. · UCLC38468 CU-MARK
- Thomas Commerford Martin for Electrical World to SLC and Isabel V. Lyon, 29 December 1908 · New York, N.Y. · UCLC38522 CU-MARK
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