@misc{indiciaee66ca62c5608,
  title = {A study of workload in a mining area practice.},
  author = {J G Rider and W H Waters and R B Charnock and J E Lunn},
  year = {1969},
  url = {https://pubmed.ncbi.nlm.nih.gov/5786471/},
  note = {Source identifier: 5786471}
}