TY  - RPRT
TI  - CALCULUS FORMATION IN THE MAXILLARY SINUS.
AU  - W J ESSER
PY  - 1965
DO  - 10.1016/0030-4220(65)90345-2
UR  - https://pubmed.ncbi.nlm.nih.gov/14293966/
ID  - 14293966
ER  -