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2. Haemoglobin levels in adults and children;Berry;Brit. med. J.,1952
3. Haemoglobinometri, standardisering af haemometre og haemoglobin-norm;Bierring;Nord. Med.,1940
4. Primary iron-deficiency anemia in young men;Brumfitt;Quart. J. Med.,1960
5. Variation of the hemoglobin level with age and sex;Hawkins;Blood,1954