Elements of Railway Signaling Pamphlet 1979.
Rochester, New York: General Railway Signal, 1979. Hardcover. 28.5 x 22 cm. Quarto. Black boards, gilt lettering. Several sections with their own pagination, approximately 200 pages. Section titles are: "Brief History of Railway Signaling", "Track circuits, Non-coded", "Block Signaling, Single-Direction Running", "Block Signaling, Double-Direction Running", "Track Circuits, Coded and Electronic"..... More