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- [4] COMPARATIVE STUDIES ON PIGS RECEIVING ORAL AS WELL AS CECAL ADMINISTRATION OF N-15 LYSINE AND N-15 UREA ARCHIV FUR TIERERNAHRUNG-ARCHIVES OF ANIMAL NUTRITION, 1984, 34 (08): : 589 - 590
- [7] Effect of method of N-application and modified urea on N-15 recovery by rice FERTILIZER RESEARCH, 1996, 43 (1-3): : 143 - 148
- [8] OBTENTION OF THE COMPOUNDS MARKED WITH N-15 .2. PREPARATION OF UREA MARKED WITH N-15 REVISTA DE CHIMIE, 1979, 30 (04): : 327 - 330
- [9] THE NON-INVASIVE MEASUREMENT OF UREA KINETICS IN NORMAL MAN BY A CONSTANT INFUSION OF N-15 N-15 UREA HUMAN NUTRITION-CLINICAL NUTRITION, 1984, 38C (05): : 339 - 354
- [10] UREA UTILIZATION IN GROWING LAMBS .6. N BALANCES WITH N-15 UREA ARCHIV FUR TIERERNAHRUNG-ARCHIVES OF ANIMAL NUTRITION, 1988, 38 (01): : 53 - 65