WIA GC/1903/235 | Prausnitz, Carl to Warburg, Aby 27/03/1903 | thanks him for Warburg's information on grass blossoms; will visit him in Florence on his travel... |
WIA GC/1903/253 | Schultz, Otto to Warburg, Aby 17/03/1903 | Dr. Carl Prausnitz, who is researching hayfever and inoculation against it, is going to Italy to... |