TY  - RPRT
TI  - Let's take a rational look at permanent second molar extraction.
AU  - A J Haas
PY  - 1986
DO  - 10.1016/0889-5406(86)90001-6
UR  - https://pubmed.ncbi.nlm.nih.gov/3465230/
ID  - 3465230
ER  -