@misc{indiciae9ba16035e8fa,
  title = {Letter: Practice expenses.},
  author = {J H Ridgwick and P Jeavons and T S Singh},
  year = {1974},
  doi = {10.1136/bmj.2.5917.506-d},
  url = {https://pubmed.ncbi.nlm.nih.gov/4834129/},
  note = {Source identifier: 4834129}
}