A.R.A. Signal Section books & textbook

American Railway Signaling Principles and Practices, Chapter III, Principles and Economics of Signaling

A.R.A. Signal Section

Signal Section, A.R.A. / Paperback

American Railway Signaling Principles and Practices, Chapter XVIII, Electro-Pneumatic Interlocking (Chapter XVIII)

A.R.A. Signal Section

American Railway Association Signal Section / Paperback / 69 Pages

American Railway Signaling Principles and Practices, Chapter XV Automatic Block Systems (Chapter XV)

Signal Section A.R.A.

Self published / Paperback / 46 Pages

American Railway Signaling Principles and Practices, Chapter VII Direct Current Track Circuits (Chapter VII)

A.R.A. Signal Section

Self published / Paperback / 39 Pages