Block signals and appliances for the automatic control of railway trains ...
Subtitle: Report. <To accompany H.J. Res. 153.>
Series: 59th Cong., 1st sess. House. Rept -- 4637
Publisher: Govt. print. off.
Published: 1906
Place of publication: Washington
Language: eng
Subjects: Railroads; Signaling; Block system
Notes: Submitted by Mr. Mann. Ordered printed June 1, 1906.