| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Block System of Signaling On American Railroads: The Methods and Appliances Used in Manual and Automatic Block Signaling, Also Descriptions of ... and Power Operated Interlocking Machines | 978-1-146-29574-1 (1-146-29574-X) | 2010 |
| The Block System of Signaling On American Railroads: The Methods and Appliances Used in Manual and Automatic Block Signaling, Also Descriptions of ... and Power Operated Interlocking Machines | 978-1-146-65321-3 (1-146-65321-2) | 2010 |