1. Coca, A. F., and Klein, M. “A Hitherto undescribed pair of isoagglutination elements in human beings,”J. Immunol., 1923,8, 477.
2. Davidsohn, I. “A method for recognition of blood sub-groups A1 and A2 as a means of avoiding transfusion reactions,”J. A. M. A., 1939,112–1, 713.
3. Enthoven, R. E.Tribes and Castes of Bombay, Government of Bombay, Bombay, 1920,Vol. III, Musalman, p. 72.
4. Friedenreich, V. Quoted in 17 below.
5. — and Warsaae, E. Quoted by Friedenreich, V., “Blood group and genetics,”Ann. Eugenics, 1938,8, 152.