TY  - RPRT
TI  - Echocardiography: M-mode and two-dimensional methods.
AU  - R L Popp
AU  - D S Rubenson
AU  - C R Tucker
AU  - J W French
PY  - 1980
DO  - 10.7326/0003-4819-93-6-844
UR  - https://pubmed.ncbi.nlm.nih.gov/7447194/
ID  - 7447194
ER  -