TY  - RPRT
TI  - Maxillary first molars with six canals.
AU  - A Martínez-Berná
AU  - P Ruiz-Badanelli
PY  - 1983
DO  - 10.1016/s0099-2399(83)80188-5
UR  - https://pubmed.ncbi.nlm.nih.gov/6579196/
ID  - 6579196
ER  -