Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/216 | Plans of workings at Ordnance Survey National Grid Reference NS 26/6213 Bridgend Colliery, West Polquhirter, East Polquhirter, Burton and Castle Mains noted on these plans. | 1957 |