2021. Studying the Effect of the Energy Settings of the HO-YAG Laser and the Composition of the Stones on the Fragmentation Time in vitro. University of Thi-Qar Journal of Science. 8, 2 (Oct. 2021), 86–93. DOI:https://doi.org/10.32792/utq/utjsci.v8i2.818.