TY  - RPRT
TI  - External-internal progressive resorption and its nonsurgical correction.
AU  - A L Frank
PY  - 1981
DO  - 10.1016/s0099-2399(81)80310-x
UR  - https://pubmed.ncbi.nlm.nih.gov/6945390/
ID  - 6945390
ER  -