TY  - RPRT
TI  - Retrograde percutaneous stone removal using modified Lawson technique.
AU  - J P Spirnak
AU  - M I Resnick
PY  - 1987
DO  - 10.1016/0090-4295(87)90434-1
UR  - https://pubmed.ncbi.nlm.nih.gov/3686771/
ID  - 3686771
ER  -