@misc{indiciaeecf20fc776df,
  title = {Statistical evaluation of contraceptive methods.},
  author = {C Tietze and S Lewit},
  year = {1974},
  doi = {10.1007/978-1-4612-4702-9\_11},
  url = {https://pubmed.ncbi.nlm.nih.gov/4825701/},
  note = {Source identifier: 4825701}
}