| Clue | Source | Date |
|---|---|---|
| Vehicles of mine? | LA Times Daily | 15 Dec 2023 |
| Mine carriers | The Washington Post | 04 Aug 2018 |
| Mine carriers | LA Times Daily | 04 Aug 2018 |
| Mine transports | Premier Sunday | 06 May 2018 |
| Mine carriers | ||
| Mine vehicles | Premier Sunday | 03 Sep 2017 |
| Coal mine vehicles | ||
| Mine vehicles. |