1 ﹒ WalshPC . Campbell ’ sU rology . 8the d .4 ﹒ HammadFT,Kaya M,KazimE . Bladderc alculi:didt he clinicalp icture change?Bladder calculus resulting fromthem igration of an intrauterine contracep tive device .6 ﹒ HuangWC,Yang J M . Sonographic appearance ......