Block signal operation. : A practical manual /

Bibliographic Details
Main Author:	Derr, William L.
Format:	Book
Language:	English
Published:	New York : D. Van Nostrand, 1897.
Subjects:	Railroads > Signaling > Block system.

Description
Item Description:	Includes index.
Physical Description:	iii, 270 pages : illustrations ; 18 cm.