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3. J. Neel and W. J. Schull, “Human Heredity,” University of Chicago Press, Chicago, 1954.
4. M. Samter and H. L. Alexander, “Immunological Diseases,” Little, Brown and Co., Boston, 1965.
5. K. Landsteiner, “The Specificity of Serological Reactions,” 2nd ed., Dover Publications, Inc., New York.