TY  - RPRT
TI  - Maxillary first molar with six canals.
AU  - J L Bond
AU  - G Hartwell
AU  - F R Portell
PY  - 1988
DO  - 10.1016/s0099-2399(88)80180-8
UR  - https://pubmed.ncbi.nlm.nih.gov/3251981/
ID  - 3251981
ER  -