BRIEF [O.A.] Budde (et.al.) Author: Budde (et.al.) Recipient: Haeckel, Ernst Corporation: Friedrich Krupp Aktiengesellschaft Dating: 03.10.1903
BRIEF [O.A.] Herdman, William A... Author: Herdman, William A... Recipient: Haeckel, Ernst Corporation: University Dating: 23.12.1903