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Study guide and reference material for commercial radio operator examinations.

APA Citation

United States. Federal Communications Commission. (1955). Study guide and reference material for commercial radio operator examinations. Rev. May 15, 1955. Washington: U.S. G.P.O. .

MLA Citation

United States. Federal Communications Commission. Study Guide And Reference Material for Commercial Radio Operator Examinations. Rev. May 15, 1955. Washington: U.S. G.P.O. , 1955.

Warning: These citations may not always be complete (especially for serials).