305,228 BERG CLAS Alkaline citrate in prevention of recurrent calcium oxalate stones : [disertation] / Clas Berg ; Linköping University, Department of Urology and Clinical Chemistry. - Linköping : University, 1990. - 83 s. : wykr. ; 25 cm (Scandinavian Journal of Urology and Nephrology, ISSN 0300-8886 ; suppl. 130) (Linköping University Medical Dissertations ; nr 317)