Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/575 | Plans of workings at Ordnance Survey National Grid Reference NS 26/9264 Dumback No.1 Mine, Dumback No.2 Mine, Dumback No.2 Colliery and Polkemmet Colliery noted on these plans. | 1958-1961 |