Brynlliw Colliery - Six Feet Seam, Seam Sections S25 & S26 Faces, also the effect of Swansea Six Feet and Three Feet coal on the ash content of the dry duff mixture (1576/74/SW) Dec 1973

  • This material is held at
  • Reference
      GB 216 D/D PRO/NCB/6/1627
  • Dates of Creation
      Dec 1973
  • Language of Material
  • Physical Description
      1 file