@misc{indiciae7dd91c5069f4,
  title = {Retroperitoneal ectopic pregnancy.},
  author = {J S Hall and M Harris and R C Levy and E R Walrond},
  year = {1973},
  doi = {10.1111/j.1471-0528.1973.tb02140.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4696567/},
  note = {Source identifier: 4696567}
}