Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/721 | Plans of workings at Ordnance Survey National Grid Reference NT 36/1493 Lassodie Mill Colliery, Netherton, Waddell Shaft and No. 1 or Flower Shaft named on these plans. | 1957-1960 |