TY  - RPRT
TI  - Echocardiogram in aortic stenosis.
AU  - R Bassan
PY  - 1977
DO  - 10.1016/0002-9149(77)90026-1
UR  - https://pubmed.ncbi.nlm.nih.gov/879038/
ID  - 879038
ER  -