The Principles Underlying Radio Communication. Radio Communication Pamphlet No. 40, Revised to May 24, 1921

U.S. War Department, Signal Corps

Editore: GPO, Place_Pub: Washington, DC, 1922

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619, illus., tables, appendices, index, weakness to rear board, boards scuffed and worn along edges.

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• Titolo: The Principles Underlying Radio Communication. Radio Communication Pamphlet No. 40, Revised to May 24, 1921
• Editore: GPO, Place_Pub: Washington, DC
• Data di pubblicazione: 1922
• Edizione: Second Edition.
• Condizione: fair