@misc{indiciae8439bfdba8d5,
  title = {Current issues in research on early development.},
  author = {A E Siegel},
  year = {1969},
  doi = {10.1159/000270856},
  url = {https://pubmed.ncbi.nlm.nih.gov/5791920/},
  note = {Source identifier: 5791920}
}