title: Upper urinary tract calculi: analysed by x-ray diffraction and chemical methods.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D055598:Chemical Phenomena; D002621:Chemistry; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007194:India; D007669:Kidney Calculi / Q000378:metabolism*; D008875:Middle Aged; D012846:Singapore; D014514:Ureteral Calculi / Q000378:metabolism*; D014961:X-Ray Diffraction