| 1929 WARNER Railway Traffic Controlling Art |
| 1929 WEATHERS Ornamental Traffic Signal Patent 49343 |
| 1929 THOMPSON Railway Traffic Controlling Art |
| 1929 SKENE Railway Traffic Controlling Art |
| 1929 STOKER Railway Traffic Controlling Art |
| 1929 WATERHOUSE Design Traffic Signal Patent 49344 |
| 1929 PAUL EBERSPACHER Traffic Signal Patent |
| 1929 MCCANN Railway Traffic Controlling Art |
| 1929 UNION Railway Traffic Controlling Art |
| 1929 SPENCER Traffic Signal Lamp Post Patent 49346 |
| 1929 BUTLER Design Traffic Signaling Tool Patent 49382 |
| 1929 FAILOR Railway Traffic Controlling Art |
| 1929 REED Railway Traffic Controlling Art Print |
| 1929 GEIGER Railway Traffic Controlling Art |
| 1929 GILSON Railway Traffic Controlling Art |
| 1929 GRONDAHL Railway Traffic Controlling Art |
| 1929 SORENSEN Railway Traffic Controlling Art |
| 1929 SPENCER New Traffic Signal Lamp Post Patent 49347 |
| 1929 CINCINNATI OHIO TRAFFIC REGULATIONS BOOKLET |
| July 1929 Lake Champlain Bridge Traffic Control Book |