TY  - RPRT
TI  - Heterograft aortic valve replacement.
AU  - J K Clarebrough
AU  - M F O'Brien
AU  - J P Richardson
PY  - 1972
DO  - 10.5694/j.1326-5377.1968.tb28760.x
UR  - https://pubmed.ncbi.nlm.nih.gov/4673989/
ID  - 4673989
ER  -