Supplement to "Study guide and reference material for commercial operator examinations" revised May 15, 1955 : study material for commercial operator examinations.
| Corporate Author: | |
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
Federal Communications Commission,
1974.
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| Subjects: |
| Item Description: | "Elements one, two, three, four, and nine." |
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| Physical Description: | 1 unnumbered page, i, 65 pages : illustrations ; 26 cm. |