TY  - RPRT
TI  - Endodontic morphology. IV. A comparative study.
AU  - R W Hession
PY  - 1977
DO  - 10.1016/0030-4220(77)90036-6
UR  - https://pubmed.ncbi.nlm.nih.gov/271929/
ID  - 271929
ER  -