Scientist at the U.S. Bureau of Standards, ?
Scientist at the U.S. Bureau of Standards, measuring radio wavelengths to regulate the new phenomena of commercial radio broadcasting. 1925
Picture No
10664875
Media ID
45230152
Size
3000px x 2567px
(1.1MB)
Credit
Mary Evans / Everett Collection
Usage Restrictions
Strictly editorial use only. Please contact Mary Evans if any other use required
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Broadcasting Bureau Measuring Regulate Standards Wavelengths
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