@misc{indiciae9082237fd0a3,
  title = {CPD.},
  author = {C J Lewis},
  year = {1989},
  doi = {10.1136/vr.125.6.137},
  url = {https://pubmed.ncbi.nlm.nih.gov/2773261/},
  note = {Source identifier: 2773261}
}