@misc{indiciae362342610c58,
  title = {Viewpoint: provider licensing--a monopoly won't work.},
  author = {G P Sawyer},
  doi = {10.1002/j.2048-7940.1981.tb00697.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6914879/},
  note = {Source identifier: 6914879}
}