BRIEF OHNE UMSCHLAG Friedmann, Hermann Author: Friedmann, Hermann Recipient: Haeckel, Ernst Dating: 19.04.1901
BRIEF OHNE UMSCHLAG Friedmann, Hermann Author: Friedmann, Hermann Recipient: Haeckel, Ernst Dating: 11.06.1901
BRIEF OHNE UMSCHLAG Friedmann, Hermann Author: Friedmann, Hermann Recipient: Haeckel, Ernst Dating: 03.09.1901
BRIEF OHNE UMSCHLAG Friedmann, Hermann Author: Friedmann, Hermann Recipient: Haeckel, Ernst Dating: 25.09.1901
BRIEF OHNE UMSCHLAG Dodel-Port, Arnold Author: Dodel-Port, Arnold Recipient: Haeckel, Ernst Dating: 07.11.1901
BRIEF OHNE UMSCHLAG Sarasin, Fritz Author: Sarasin, Fritz Recipient: Haeckel, Ernst Dating: 09.11.1901
BRIEF OHNE UMSCHLAG Keller, Conrad Author: Keller, Conrad Recipient: Haeckel, Ernst Dating: 12.07.1901
BRIEF OHNE UMSCHLAG Krause, Adelheid Author: Krause, Adelheid Recipient: Haeckel, Ernst Dating: 24.08.1901
BRIEF OHNE UMSCHLAG Sigg-Wagner, Hermann Author: Sigg-Wagner, Hermann Recipient: Haeckel, Ernst Dating: 04.01.1901
BRIEF OHNE UMSCHLAG Suter, Karl Friedrich Author: Suter, Karl Friedrich Recipient: Haeckel, Ernst Dating: 10.10.1901