@misc{indiciaec23092e9b692,
  title = {[Gastroenterologic roentgen quiz].},
  author = {R Ammann and J Bivetti and E Kobler and P Peter},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/323609/},
  note = {Source identifier: 323609}
}