TY  - RPRT
TI  - Audio amplification in pyelolithotomy and nephrolithotomy.
AU  - R Zufall
AU  - W Pomerantz
PY  - 1969
DO  - 10.1016/s0022-5347(17)62198-0
UR  - https://pubmed.ncbi.nlm.nih.gov/5347760/
ID  - 5347760
ER  -