@misc{indiciae12ccfc6e0bbc,
  title = {Interval between pregnancies.},
  author = {J D Erickson and T Bjerkedal},
  year = {1979},
  doi = {10.1016/s0140-6736(79)90502-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/83505/},
  note = {Source identifier: 83505}
}