Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/471 | Plans of workings at Ordnance Survey National Grid Reference NS 26/8495 No colliery names listed on these plans. East Gogar, Bridgend (ruins), Ditch and Knowfaulds noted on these plans. | [20th century] |