BRIEF [O.A.] Bianchi [Baronne de], Duchesse de Casalanza Author: Bianchi [Baronne de], Duchesse de Casalanza Recipient: Haeckel, Ernst Dating: 27.08.1882
BRIEF [O.A.] Bianchini, Arnoldo Author: Bianchini, Arnoldo Recipient: Haeckel, Ernst Dating: 10.04.1907
BRIEF [O.A.] Lo Bianco, Salvatore Author: Lo Bianco, Salvatore Recipient: Haeckel, Ernst Corporation: Stazione Zoologica Dating: 10.01.1887
BRIEF [O.A.] Lo Bianco, Salvatore Author: Lo Bianco, Salvatore Recipient: Haeckel, Ernst Dating: 01.01.1891
BRIEF [O.A.] Binet, René Author: Binet, René Recipient: Haeckel, Ernst Corporation: Ministère du Commerce, de l'Industrie, des Postes et des Télégraphes Dating: 21.03.1899
BRIEF [O.A.] Blochmann, Friedrich Author: Blochmann, Friedrich Recipient: Haeckel, Ernst Corporation: Zoologisches Institut der Universität Dating: 14.02.1904
