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2. A Clinical Evaluation of the Copper Sulphate Method for Measuring Specific Gravities of Whole Blood and Plasma;Atchley J.;J. Lab. clin. Med.,1945
3. The Falling Drop Method for Determining Specific Gravity;Barbour H. G.;J. biol. Chem.,1926
4. The total nitrogen content of egg albumin and other proteins