BRIEF OHNE UMSCHLAG Strasburger, Eduard Author: Strasburger, Eduard Recipient: Haeckel, Ernst Dating: 26.12.1868
BRIEF OHNE UMSCHLAG Strasburger, Eduard Author: Strasburger, Eduard Recipient: Haeckel, Ernst Dating: 24.10.1868
BRIEF OHNE UMSCHLAG Strasburger, Eduard Author: Strasburger, Eduard Recipient: Haeckel, Ernst Dating: 23.01.1868
BRIEF OHNE UMSCHLAG Hein, Reinhold Author: Hein, Reinhold Recipient: Haeckel, Ernst Dating: 23.02.1868
BRIEF OHNE UMSCHLAG Schubert, Adolph Author: Schubert, Adolph Recipient: Haeckel, Ernst Dating: 03.10.1868
BRIEF [O.A.] Lampert, Friedrich Ernst Wilhelm Author: Lampert, Friedrich Ernst Wilhelm Recipient: Haeckel, Ernst Dating: 19.01.1868
BRIEF [O.A.] Lampert, Friedrich Ernst Wilhelm Author: Lampert, Friedrich Ernst Wilhelm Recipient: Haeckel, Ernst Dating: 03.10.1868
BRIEF OHNE UMSCHLAG Haeckel, Karl Author: Haeckel, Karl Recipient: Haeckel, Charlotte Dating: 14.10.1868