| Reference | Title | Date |
| RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
| RHP146000/167 | Plans of workings at Ordnance Survey National Grid Reference NS 26/5227 Sorn Colliery, East Montgarswood, West Montgarswood and Mid Montgarswood noted on these plans. | 1953-1963 |