@misc{indiciae2294a1c32c9b,
  title = {Improved Friedman pregnancy test.},
  author = {J C NORRIS and J SPINK},
  year = {1953},
  doi = {10.1097/00007611-195309000-00021},
  url = {https://pubmed.ncbi.nlm.nih.gov/13089900/},
  note = {Source identifier: 13089900}
}