TY  - RPRT
TI  - Heart valve replacement in the elderly.
AU  - A H de Bono
AU  - T A English
AU  - B B Milstein
PY  - 1978
DO  - 10.1136/bmj.2.6142.917
UR  - https://pubmed.ncbi.nlm.nih.gov/709126/
ID  - 709126
ER  -