@misc{indiciae085a50c8bdc6,
  title = {Plasma progesterone in snakes.},
  author = {S W Chan and S Ziegel and I P Callard},
  year = {1973},
  doi = {10.1016/0300-9629(73)90514-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/4145773/},
  note = {Source identifier: 4145773}
}