@misc{indiciae067a22416445,
  title = {Contour photography.},
  author = {N R Robertson},
  year = {1976},
  doi = {10.1179/bjo.3.2.105},
  url = {https://pubmed.ncbi.nlm.nih.gov/1065377/},
  note = {Source identifier: 1065377}
}