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11. Licenses. Regulations governing issuance of radio operators' licenses.

Corporate/Agency Authors:: Radio Division and Commerce Department
Publisher:: Radio Division
Date:: [Jan. 2, 1931.]
SuDoc number:: C 24.2:L 61/931

12. Radio service bulletin, Apr. 30, 1931; no. 169.

Corporate/Agency Authors:: Radio Division and Commerce Department
Publisher:: Radio Division
Date:: [1931.]
SuDoc number:: C 24.3:169

13. Radio service bulletin, Aug. 31, 1931; no. 173.

Corporate/Agency Authors:: Radio Division and Commerce Department
Publisher:: Radio Division
Date:: [1931.]
SuDoc number:: C 24.3:173-

14. Radio service bulletin, Dec. 31, 1930; no. 165.

Corporate/Agency Authors:: Radio Division and Commerce Department
Publisher:: Radio Division
Date:: [1931.]
SuDoc number:: C 4.3:165

15. Radio service bulletin, Feb. 28, 1931; no. 167.

Corporate/Agency Authors:: Radio Division and Commerce Department
Publisher:: Radio Division
Date:: [1931.]
SuDoc number:: C 24.3:167

16. Radio service bulletin, Jan. 31, 1931; no. 166.

Corporate/Agency Authors:: Radio Division and Commerce Department
Publisher:: Radio Division
Date:: [1931.]
SuDoc number:: C 24.3:166

17. Radio service bulletin, July 31, 1931; no. 172.

Corporate/Agency Authors:: Radio Division and Commerce Department
Publisher:: Radio Division
Date:: [1931.]
SuDoc number:: C 24.3:172

18. Radio service bulletin, June 30, 1931; no. 171.

Corporate/Agency Authors:: Radio Division and Commerce Department
Publisher:: Radio Division
Date:: [1931.]
SuDoc number:: C 24.3:171

19. Radio service bulletin, Mar. 31, 1931; no, 168.

Corporate/Agency Authors:: Radio Division and Commerce Department
Publisher:: Radio Division
Date:: [1931.]
SuDoc number:: C 24.3:168

20. Radio service bulletin, May 29, 1931; no. 170.

Corporate/Agency Authors:: Radio Division
Publisher:: Radio Division
Date:: [1931.]
SuDoc number:: C 24.3:170

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