Harzer, G Human milk nonprotein nitrogen components: changing patterns of free amino acids and urea in the course of early lactation. [electronic resource] - The American journal of clinical nutrition Aug 1984 - 303-9 p. digital Publication Type: Journal Article ISSN: 0002-9165 Standard No.: 10.1093/ajcn/40.2.303 doi Subjects--Topical Terms: Amino Acids--analysisFemaleGlutamates--analysisGlutamic AcidHumansLactationMilk, Human--analysisNitrogen--analysisPregnancyTime FactorsUrea--analysis