1. Dresbach, M., Science, 19, 469 (1904).
2. Miller, J. K., and Lucas, M. A., Amer. J. Clin. Path., 8, 391 (1938).
3. Wyandt, H., Bancroft, P. M., and Winship, T. O., Arch. Intern. Med., 68, 1043 (1941).
4. Wintrobe, M. M., Clinical Hematology (Lea and Febiger, Philadelphia, 1961).
5. Conti, C., Torlontano, G., and Muzzolini, M., Policlinico sez. prat., 69, 1477 (1962).