BRIEF OHNE UMSCHLAG Chun, Carl Author: Chun, Carl Recipient: Haeckel, Ernst Corporation: Zoologisches Institut Dating: 26.12.1902
BRIEF OHNE UMSCHLAG Chun, Carl Author: Chun, Carl Recipient: Haeckel, Ernst Corporation: Zoologisches Institut Dating: 28.10.1903
BRIEF OHNE UMSCHLAG Chun, Carl Author: Chun, Carl Recipient: Haeckel, Ernst Corporation: Zoologisches Institut Dating: 15.10.1904
BRIEF OHNE UMSCHLAG Chun, Carl Author: Chun, Carl Recipient: Haeckel, Ernst Corporation: Zoologisches Institut Dating: 23.07.1908
BRIEF OHNE UMSCHLAG Chun, Carl Author: Chun, Carl Recipient: Haeckel, Ernst Corporation: Zoologisches Institut Dating: 16.02.1914