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2. Trace elements in milk: A review. Part II;Archibald;Dairy Sci. Abstr.,1958
3. The Trace Elements in Biochemistry;Bowen,1966
4. Intakes and excretions of Fe, Cu, and Zn in the neonatal period;Cavell;Arch. Dis. Childhood,1964
5. Multiple range and multiple F tests;Duncan;Biometrics,1955