Centralized traffic control
type F, class M, duplex, coded system description of circuits.
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Publication
1937 - General railway signal company, Rochester, N.Y, No place, unknown, or undetermined
Language
English
Word Count
41,250 words, Guess
Page Count
165 pages
Identifiers
- Library of Congress Control Number38019980
- OCLC Control Number3236135
- Open LibraryOL6373055M
Classifications
- DDC625.16
- LCCTF639 .G4
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