Synopsis of the signal systems based upon the dot and dash and two-arm semaphore codes
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Author
Publication
1918 - U.S. Gov. Print. Off., Washington, D.C, District of Columbia
Language
English
Word Count
0 words, Guess
Page Count
0 pages
Identifiers
- Internet Archivesynopsisofsignal00unit
- OCLC Control Number80963701
- Open LibraryOL25504528M
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