Graphs. 6 pages (pp. 1090-1095) IN: Munchener Medizinische Wochenschrift, vol. 49, no. 26. Tall 4to, modern wrappers. Muenchen, 1902. First Edition. Whole issue offered entire.
Following Landsteiner's division of human blood into three groups, Decastello and Sturli discovered a fourth (the rarest) group. GM 893.