Brynlliw Colliery. Comparison of Yields with the Joy Continuous Miner, Joy Loader and Anbau Hobel Plough (631/61/1) Jul 1961

  • This material is held at
  • Reference
      GB 216 D/D PRO/NCB/6/851
  • Dates of Creation
      Jul 1961
  • Language of Material
      English
  • Physical Description
      1 file