@misc{indiciae647976919c9b,
  title = {Extraosseous osteogenic sarcoma.},
  author = {F Wurlitzer and L Ayala and M Romsdahl},
  year = {1972},
  doi = {10.1001/archsurg.1972.04180110016006},
  url = {https://pubmed.ncbi.nlm.nih.gov/4507677/},
  note = {Source identifier: 4507677}
}