TY  - RPRT
TI  - Simple subcortical mastoidectomy.
AU  - J A Donaldson
PY  - 1969
DO  - 10.1001/archotol.1969.00770020914022
UR  - https://pubmed.ncbi.nlm.nih.gov/5786299/
ID  - 5786299
ER  -