TY  - RPRT
TI  - Ultrasound and the missing loop.
AU  - R H Picker
AU  - D M Saunders
PY  - 1976
DO  - 10.1111/j.1440-1673.1976.tb02009.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1021123/
ID  - 1021123
ER  -