BRIEF [O.A.] Koch, Gottlieb von Author: Koch, Gottlieb von Recipient: Haeckel, Ernst Dating: 14.05.1884
BRIEF [O.A.] Koch, Gottlieb von Author: Koch, Gottlieb von Recipient: Haeckel, Ernst Dating: 06.01.1889
BRIEF [O.A.] Koch, Gottlieb von Author: Koch, Gottlieb von Recipient: Haeckel, Ernst Dating: 04.12.1889
BRIEF [O.A.] Koch, Gottlieb von Author: Koch, Gottlieb von Recipient: Haeckel, Ernst Dating: 02.02.1891
BRIEF [O.A.] Koch, Gottlieb von Author: Koch, Gottlieb von Recipient: Haeckel, Ernst Dating: 16.10.1891
BRIEF [O.A.] Koch, Gottlieb von Author: Koch, Gottlieb von Recipient: Haeckel, Ernst Dating: 28.02.1892
BRIEF [O.A.] Koch, Gottlieb von Author: Koch, Gottlieb von Recipient: Haeckel, Ernst Dating: 30.03.1898
BRIEF [O.A.] Koch, Gottlieb von Author: Koch, Gottlieb von Recipient: Haeckel, Ernst Dating: 27.02.1914
BRIEF [O.A.] N.N. Author: N.N. Recipient: Haeckel, Ernst Corporation: Kaufmännischer Verein Dating: 06.08.1883
BRIEF [O.A.] N.N. Author: N.N. Recipient: Haeckel, Ernst Corporation: Kaufmännischer Verein Dating: 04.08.1878