TY  - RPRT
TI  - Some biologic considerations in orthodontic research.
AU  - R L Christiansen
PY  - 1971
DO  - 10.1016/0002-9416(71)90146-1
UR  - https://pubmed.ncbi.nlm.nih.gov/5284437/
ID  - 5284437
ER  -