No. 9 Area. Onllwyn No. 3 Colliery. a) the Grey Seam, b) the Rhyd Seam. Aug 1953

  • This material is held at
  • Reference
      GB 216 D/D PRO/NCB/6/71
  • Dates of Creation
      Aug 1953
  • Language of Material
      English
  • Physical Description
      1 file