TY  - RPRT
TI  - Measuring the reflection coefficient for ultrasonic interfaces.
AU  - R L Pimmel
PY  - 1972
DO  - 10.1016/0041-624x(72)90139-4
UR  - https://pubmed.ncbi.nlm.nih.gov/4652745/
ID  - 4652745
ER  -