TY  - RPRT
TI  - [Maxillary antrum surgery with or without bone lid formation. Retrospective comparative study].
AU  - J Portugall
AU  - F Khoury
AU  - R Becker
AU  - G Habel
UR  - https://pubmed.ncbi.nlm.nih.gov/2598507/
ID  - 2598507
ER  -