BRIEF OHNE UMSCHLAG Stremayr, Karl Ritter von Author: Stremayr, Karl Ritter von Recipient: Haeckel, Ernst Dating: 29.01.1871
BRIEF OHNE UMSCHLAG Bacmeister, Adolf Author: Bacmeister, Adolf Recipient: Haeckel, Ernst Dating: 22.03.1871
BRIEF OHNE UMSCHLAG Darwin, Charles Author: Darwin, Charles Recipient: Haeckel, Ernst Dating: 03.03.1871
BRIEF OHNE UMSCHLAG Darwin, Charles Author: Darwin, Charles Recipient: Haeckel, Ernst Dating: 27.12.1871
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Strasburger, Eduard Dating: 26.12.1871
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Wundt, Wilhelm Dating: 23.05.1871
BRIEF OHNE UMSCHLAG Greeff, Richard Author: Greeff, Richard Recipient: Haeckel, Ernst Dating: 16.01.1871