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- [3] DETERMINATION OF URINARY UREA NITROGEN CONCENTRATION WITH MODIFIED BLOOD UREA NITROGEN PROCEDURES CLINICAL PHARMACY, 1990, 9 (05): : 371 - 373
- [8] Sources of error in blood urea and nitrogen determination JOURNAL OF LABORATORY AND CLINICAL MEDICINE, 1925, 10 (4/12): : 0934 - 0935