@misc{indiciae613d61a3e12e,
  title = {Prolonged gestation in two guernsey cows.},
  author = {K McENTEE and S J ROBERTS and R M SEARS},
  year = {1952},
  url = {https://pubmed.ncbi.nlm.nih.gov/14936436/},
  note = {Source identifier: 14936436}
}