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Factors retarding transmission of radio signals underground, and some further experiments and conclusions

Published Year

• 1920-1929 (1)

Subject

• Geophone (1) *
• Radio--Receivers and reception (1)
• Radio--Transmitters and transmission (1)
• Telecommunication (1)

Author

• Jakosky, Jay John, (1)
• Zellers, Donald Henry, (1) *

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