Excerpts from United States Renal Data System. 1997 annual report : the National Institutes of Health, the National Institute of Diabetes and Digestive and Kidney Diseases, division of kidney, urologic, and hematologic diseases (Bethesda, April 1997) Vol. 30 No. 2, Suppl. 1 1997. Philadelphia : Saunders, 1997. 213 s. [1, z toho voľných 0, prezenčne 1]