1. 1. Blood Program Medical-Technical Manual, The American National Red Cross, ARC Publication 1702, Sec. 11, pp. 9-10, September 1959.
2. Copper sulfate screening of blood donors: Report of a donor passing the test with less than eight grams of hemoglobin;Manncerino;Transfusion,1963
3. Measurement of specific gravities of whole blood and plasma by standard copper sulfate solutions;Phillips;J. Biol. Chem.,1950
4. The determination of hemoglobin in blood banks;Pirofsky;Transfusion,1964