Important events in radiotelegraphy

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110 1 ‡aUnited States. ‡bDept. of Commerce. ‡bBureau of Navigation.
245 1 0 ‡aImportant events in radiotelegraphy. ‡cFebruary 1, 1916
260 ‡aWashington, ‡bGovt. Print. Off., ‡c1916.
300 ‡a25 p. ‡c19 cm.
500 ‡aAt head of title: Department of Commerce. Bureau of Navigation. Radio Service.
538 ‡aMode of access: Internet.
650 0 ‡aTelegraph, Wireless.
CID ‡a006502716
COM ‡d20130926000000.0 ‡mThe leading $ in the barcode of this record was either added or removed to achieve parity with the University of Michigan Aleph system.
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DAT 1 ‡a20130926122903.0 ‡b2023-05-31T17:57:59Z
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FMT ‡aBK
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