@misc{indiciaed0a9ff6a8962,
  title = {Peroral endoscopy.},
  author = {F J PUTNEY and J J O'KEEFE and T E DOUGLAS and F J McNELIS},
  year = {1951},
  doi = {10.1001/archotol.1951.03750090083009},
  url = {https://pubmed.ncbi.nlm.nih.gov/14868109/},
  note = {Source identifier: 14868109}
}