TY  - RPRT
TI  - Improved needle-tip visualization by color Doppler sonography.
AU  - U M Hamper
AU  - B L Savader
AU  - S Sheth
PY  - 1991
DO  - 10.2214/ajr.156.2.1898823
UR  - https://pubmed.ncbi.nlm.nih.gov/1898823/
ID  - 1898823
ER  -