BRIEF OHNE UMSCHLAG Schild, Johann Author: Schild, Johann Recipient: Haeckel, Ernst Dating: 12.02.1902
BRIEF OHNE UMSCHLAG Schild, Johann Author: Schild, Johann Recipient: Haeckel, Ernst Dating: 08.10.1902
BRIEF OHNE UMSCHLAG Schild, Johann Author: Schild, Johann Recipient: Haeckel, Ernst Dating: 11.06.1902
BRIEF OHNE UMSCHLAG Schild, Johann Author: Schild, Johann Recipient: Haeckel, Ernst Dating: 09.04.1902