BRIEF [O.A.] Mitzukuri, K... Author: Mitzukuri, K... Recipient: Haeckel, Ernst Corporation: Science College, Imperial University Dating: 09.01.1904
BRIEF [O.A.] Ishikawa, Chiyomatsu Author: Ishikawa, Chiyomatsu Recipient: Haeckel, Ernst Corporation: Tokyo Imperial University, College of Agriculture Dating: 20.01.1904
BRIEF [O.A.] Curjel, Ernst Author: Curjel, Ernst Recipient: Haeckel, Ernst Corporation: The Rationalist Press Association Dating: 30.01.1914