TY  - RPRT
TI  - Heterograft aortic-valve replacement.
AU  - M F O'Brien
AU  - J K Clareborough
PY  - 1967
DO  - 10.1016/s0140-6736(67)91491-2
UR  - https://pubmed.ncbi.nlm.nih.gov/4164403/
ID  - 4164403
ER  -