TY  - RPRT
TI  - The 'ballista spring" system for impacted teeth.
AU  - H Jacoby
PY  - 1979
DO  - 10.1016/0002-9416(79)90183-0
UR  - https://pubmed.ncbi.nlm.nih.gov/283699/
ID  - 283699
ER  -