Three published reports on the mining sector.
The Coal Commission, "The Evidence on Nationalisation of Minerals or Royalties critically examined." 1920.
The West Riding of Yorkshire Rivers Board, "Report on The Effect of Mining (Coal) Subsidence on Sewers and Sewage Disposal Works in the West Riding of Yorkshire." 1945.
The North Yorkshire, Nottinghamshire and DErbyshire Coalfield, "Analysis of Commercial Grades of Coal - Part 1" 1931.