@misc{indiciae2e702992381b,
  title = {Colliery practice.},
  author = {D G WILLIAMS},
  year = {1951},
  doi = {10.1136/bmj.2.4729.441},
  url = {https://pubmed.ncbi.nlm.nih.gov/14858879/},
  note = {Source identifier: 14858879}
}