@misc{indiciae611098b33b26,
  title = {Major steps in vertebrate evolution.},
  author = {A S Romer},
  year = {1967},
  doi = {10.1126/science.158.3809.1629},
  url = {https://pubmed.ncbi.nlm.nih.gov/4862529/},
  note = {Source identifier: 4862529}
}