TY  - RPRT
TI  - Functional appliances and arch width.
AU  - S L Gibbs
AU  - N P Hunt
PY  - 1992
DO  - 10.1179/bjo.19.2.117
UR  - https://pubmed.ncbi.nlm.nih.gov/1627522/
ID  - 1627522
ER  -