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Safety rules for radio installations comprising part 5 of the 5th ed., National Electrical Safety Code. [Supersedes H9] Issued December 1, 1939
- "National electrical safety code"@en
- "National electrical safety code"
- "Safety rules for radio installations, comprising part 5 of the 5th ed., National Electrical Safety Code. <Supersedes H9> Issued December 1, 1939"
- "Safety rules for radio installations comprising part 5 of the 5th ed., National Electrical Safety Code. [Supersedes H9] Issued December 1, 1939"@en