BRIEF OHNE UMSCHLAG Seebeck, Moritz Author: Seebeck, Moritz Recipient: Haeckel, Ernst Dating: 27.07.1862
BRIEF OHNE UMSCHLAG Seebeck, Moritz Author: Seebeck, Moritz Recipient: Haeckel, Ernst Dating: 08.08.1862
BRIEF OHNE UMSCHLAG Seebeck, Moritz Author: Seebeck, Moritz Recipient: Haeckel, Ernst Dating: 15.10.1862