TY  - RPRT
TI  - Endodontics: then and now.
AU  - L I Grossman
PY  - 1971
DO  - 10.1016/0030-4220(71)90228-3
UR  - https://pubmed.ncbi.nlm.nih.gov/4934772/
ID  - 4934772
ER  -