BRIEF OHNE UMSCHLAG Hertwig, Richard Author: Hertwig, Richard Recipient: Haeckel, Ernst Dating: 21.10.1894
BRIEF OHNE UMSCHLAG Hertwig, Richard Author: Hertwig, Richard Recipient: Haeckel, Ernst Dating: 01.12.1894
BRIEF OHNE UMSCHLAG Hertwig, Oscar Author: Hertwig, Oscar Recipient: Haeckel, Ernst Dating: 23.07.1894
BRIEF OHNE UMSCHLAG Rottenburg, Paul von Author: Rottenburg, Paul von Recipient: Haeckel, Ernst Dating: 1894
BRIEF OHNE UMSCHLAG Rottenburg, Paul von Author: Rottenburg, Paul von Recipient: Haeckel, Ernst Dating: 18.03.1894
BRIEF [O.A.] Hafferberg, Rob... C... Author: Hafferberg, Rob... C... Recipient: Haeckel, Ernst Dating: 31.12.1894
BRIEF [O.A.] Schepeler-Lette, Anna Author: Schepeler-Lette, Anna Recipient: Haeckel, Ernst Dating: 01.10.1894
