TY  - RPRT
TI  - Maxillary sinus perforations and closures.
AU  - R A Atterbury
AU  - S J Vazirani
PY  - 1968
DO  - 10.1016/0030-4220(68)90296-x
UR  - https://pubmed.ncbi.nlm.nih.gov/5238790/
ID  - 5238790
ER  -