Page 186, Fold Out Map, from the Third Annual Report of the FCC to Congress (1937)

Page 186 (fold out map) from the Third Annual Report of the Federal Communications Commission To the Congress of the United States For the Fiscal Year 1937 (PDF)

Map title: United States - Federal Communications Commission - Commercial Aviation Communication System - Showing Radio Station Locations [as they were in 1937]

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Detailed Map (scanned in sections):