TY  - RPRT
TI  - Spontaneous lower arch changes with and without second molar extractions.
AU  - J M Battagel
AU  - A Ryan
PY  - 1998
DO  - 10.1016/s0889-5406(98)70285-9
UR  - https://pubmed.ncbi.nlm.nih.gov/9484204/
ID  - 9484204
ER  -