BRIEF OHNE UMSCHLAG Seebeck, Moritz Author: Seebeck, Moritz Recipient: Haeckel, Ernst Dating: 06.04.1872
BRIEF OHNE UMSCHLAG Seebeck, Moritz Author: Seebeck, Moritz Recipient: Haeckel, Ernst Dating: 08.05.1872
BRIEF OHNE UMSCHLAG Seebeck, Moritz Author: Seebeck, Moritz Recipient: Haeckel, Ernst Dating: 06.07.1872