@misc{indiciae7190b1cfc84b, title = {Some biologic considerations in orthodontic research.}, author = {R L Christiansen}, year = {1971}, doi = {10.1016/0002-9416(71)90146-1}, url = {https://pubmed.ncbi.nlm.nih.gov/5284437/}, note = {Source identifier: 5284437} }