[Bethesda, Md.] : National Institutes of Health, National Kidney and Urologic Diseases Information Clearinghouse, U.S. Dept. of Health and Human Services, [2002]
Mode of access: Internet from NIH web site. Address as of 5/21/07: http://kidney.niddk.nih.gov/kudiseases/pubs/pdf/stones%5Fez.pdf; current access available via PURL.