@misc{indiciaea0468a42ec3b,
  title = {The NAP prism.},
  author = {G Smith and A W Johnston and J D Maddocks},
  year = {1990},
  doi = {10.1097/00006324-199002000-00013},
  url = {https://pubmed.ncbi.nlm.nih.gov/2336253/},
  note = {Source identifier: 2336253}
}