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11. Tabulation of statistics pertaining to signals, interlocking, automatic train control, telegraph and telephone for transmission of train orders, spring switches, and train communications systems, as used on railroads of United States; compiled by Bureau of Safety.

Corporate/Agency Authors:: Interstate Commerce Commission
Publisher:: Interstate Commerce Commission
Date:: [1952.]
SuDoc number:: IC 1 saf.10:852

12. Tabulation of statistics pertaining to signals, interlocking, automatic train control, telegraph and telephone for transmission of train orders, spring switches, and train communication systems as used on railroads of United States; compiled by Bureau of Safety.

Corporate/Agency Authors:: Interstate Commerce Commission
Publisher:: Interstate Commerce Commission
Date:: [1951.]
SuDoc number:: IC 1 saf.10:951

13. Tabulation of statistics pertaining to signals, interlocking, automatic train control, telegraph and telephone for transmission of train orders, spring switches, and train communication systems, as used on railroads of United States: compiled by Bureau of Safety.

Corporate/Agency Authors:: Interstate Commerce Commission
Publisher:: Interstate Commerce Commission
Date:: [1950.]
SuDoc number:: IC 1 saf.10:950

14. Tabulation of statistics pertaining to signals, interlocking, automatic train control, telegraph and telephone for transmission of train orders, spring switches, and train communication systems, as used on railroads of United States; compiled by Bureau of Safety.

Corporate/Agency Authors:: Interstate Commerce Commission
Publisher:: Interstate Commerce Commission
Date:: Jan. 1, 1949
SuDoc number:: IC 1 saf.10:949

15. Tabulation of statistics pertaining to signals, interlocking, automatic train control. telegraph and telephone for transmission of train orders, and spring switches, as used on railroads of United States: compiled by Bureau of Safety.

Corporate/Agency Authors:: Interstate Commerce Commission
Publisher:: Interstate Commerce Commission
Date:: Jan. 1, 1948
SuDoc number:: IC 1 saf.10:948

16. Tabulation of statistics pertaining to signals, interlocking, automatic train control, telegraph and telephone for transmission of train orders, and spring switches as used on railroads of United States, Jan. 1, 1947; compiled by Bureau of Safety.

Corporate/Agency Authors:: Interstate Commerce Commission
Publisher:: Interstate Commerce Commission
Date:: [1947.]
SuDoc number:: IC 1 saf.10:947

17. Signals. Tabulation of statistics pertaining to signals, interlocking, automatic train control, telegraph and telephone for transmission of train orders, and spring switches as used on railroads of United States, Jan. 1, 1946; compiled by Bureau of Safety.

Corporate/Agency Authors:: Interstate Commerce Commission
Publisher:: Interstate Commerce Commission
Date:: 1946
SuDoc number:: IC 1 saf.10:946

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