TY  - RPRT
TI  - Echocardiogram in calcified mitral anulus.
AU  - D S Hirschfeld
AU  - B B Emilson
PY  - 1975
DO  - 10.1016/0002-9149(75)90489-0
UR  - https://pubmed.ncbi.nlm.nih.gov/1166841/
ID  - 1166841
ER  -