BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Niess, Albert Dating: 30.10.1879
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Niess, Albert Dating: 21.12.1879
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Niess, Albert Dating: 28.12.1879
BRIEF OHNE UMSCHLAG Koseritz, Carl von Author: Koseritz, Carl von Recipient: Haeckel, Ernst Dating: 27.12.1879
BRIEF OHNE UMSCHLAG Koseritz, Carl von Author: Koseritz, Carl von Recipient: Haeckel, Ernst Dating: 03.03.1879
BRIEF OHNE UMSCHLAG Hertwig, Oscar Author: Hertwig, Oscar Recipient: Haeckel, Ernst Dating: 15.04.1879
BRIEF OHNE UMSCHLAG Hertwig, Richard Author: Hertwig, Richard Recipient: Haeckel, Ernst Dating: 11.03.1879
BRIEF OHNE UMSCHLAG Keller, Conrad Author: Keller, Conrad Recipient: Haeckel, Ernst Dating: 17.01.1879