Study guide and reference material for commercial radio operator examinations

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110 1 ⊔ ‡aUnited States. ‡bFederal Communications Commission. ‡0http://id.loc.gov/authorities/names/n80051251 ‡1http://id.loc.gov/rwo/agents/n80051251
245 1 0 ‡aStudy guide and reference material for commercial radio operator examinations.
260 ⊔ ⊔ ‡aWashington : ‡bU.S. Govt. Print. Off.
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362 0 ⊔ ‡aJuly 1, 1939-
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 0 ‡aRadio operators ‡zUnited States. ‡0http://id.loc.gov/authorities/subjects/sh2008110404
650 ⊔ 0 ‡aRadio ‡vExaminations, questions, etc. ‡0http://id.loc.gov/authorities/subjects/sh2008110398
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