BRIEF OHNE UMSCHLAG Schmidt, Heinrich Author: Schmidt, Heinrich Recipient: Haeckel, Ernst Dating: 22.06.1914
BRIEF OHNE UMSCHLAG Schmidt, Heinrich Author: Schmidt, Heinrich Recipient: Haeckel, Ernst Dating: 25.07.1916
BRIEF OHNE UMSCHLAG Schmidt, Heinrich Author: Schmidt, Heinrich Recipient: Haeckel, Ernst Dating: 28.06.1916
BRIEF OHNE UMSCHLAG Schmidt, Heinrich Author: Schmidt, Heinrich Recipient: Haeckel, Ernst Dating: 26.03.1899
BRIEF OHNE UMSCHLAG Schmidt, Heinrich Author: Schmidt, Heinrich Recipient: Haeckel, Ernst Dating: 13.06.1918
BRIEF OHNE UMSCHLAG Schmidt, Heinrich Author: Schmidt, Heinrich Recipient: Haeckel, Ernst Dating: 11.10.1912
BRIEF OHNE UMSCHLAG Schmidt, Heinrich Author: Schmidt, Heinrich Recipient: Haeckel, Ernst Dating: 30.09.1916