ESWL (EXTRACORPOKEAL SHOCK WAVE LITHOTRIPSY) IN THE TREATMENT OF LARGE BILE DUCT STONES - ÖZDEMİR, Ensar; ERDEN, Ayşe; ORAL, Meltem; ŞAHİN, Burhan; CUMHUR, Turhan (Turkish Journal of Gastroenterology, 1992)