TY  - BOOK
AU  - Day,John Robert
AU  - Cooper,B.K.
TI  - Railway signalling systems,
T2  - The Mechanical age library
AV  - TF615 .D3
PY  - 1959///, c1958]
CY  - London
PB  - Muller
KW  - Railroads
KW  - Signaling
N1  - Stamped: distributed by Sportshelf, New Rochelle, N.Y
ER  -