BRIEF OHNE UMSCHLAG Becker, Franz Johann Jakob Emil Author: Becker, Franz Johann Jakob Emil Recipient: Haeckel, Ernst Dating: 18.08.1916
BRIEF OHNE UMSCHLAG Bernard, Matilda Author: Bernard, Matilda Recipient: Haeckel, Ernst Dating: 12.11.1893
BRIEF OHNE UMSCHLAG Bernard, Matilda Author: Bernard, Matilda Recipient: Haeckel, Ernst Dating: 09.02.1905
BRIEF OHNE UMSCHLAG Bernardelli, Paul Author: Bernardelli, Paul Recipient: Haeckel, Ernst Dating: 06.09.1908