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The world of ham radio, 1901-1950 : a social history /
- ""This book explores the history of ham radio operators, emphasizing their social history and contributions to technological development of worldwide communications. It traces the concept of relays from as close as 25 miles apart to anywhere in the world and discusses technological advances of the twentieth century and their effects on the world of the ham radio operator"--Provided by publisher."
- "The world of ham radio, 1901-1950 : a social history /"