BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Dating: ??.??.1874
BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Dating: 12.??.1875
BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Corporation: Redaction der Bibliothek für Wissenschaft und Literatur Dating: 23.09.1875
BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Dating: 11.??.1876
BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Corporation: Redaction der Bibliothek für Wissenschaft und Literatur Dating: 19.08.1876
BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Dating: 22.??.1877
BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Dating: 25.05.1877
BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Corporation: Redaction der "Deutschen Revue" Dating: 17.06.1877
BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Corporation: Redaction der "Deutschen Revue" Dating: 15.08.1877
BRIEF [O.A.] Fleischer, Richard Author: Fleischer, Richard Recipient: Haeckel, Ernst Dating: 01.04.1878