Locomotive testing plant at Altoona, Penna. ...
Subtitle: Piston valves.
Series: Bulletin; no. 7 (rev.)
Publisher: Stephen Greene Co., printers]
Published: 1912
Place of publication: [Philadelphia
Language: eng
Number of pages: 59
Subjects: Locomotives -- Testing.; Locomotives -- Valve-gears.
Notes: "Formerly Bulletin no. 29."