BRIEF [O.A.] Sars, Georg Ossian Author: Sars, Georg Ossian Recipient: Haeckel, Ernst Dating: 01.12.1891
BRIEF [O.A.] Biddlecombe, A... Author: Biddlecombe, A... Recipient: Haeckel, Ernst Dating: 30.07.1908
BRIEF [O.A.] Danielssen, D... C... Author: Danielssen, D... C... Recipient: Haeckel, Ernst Corporation: Bergens Museums Dating: 10.01.1879
BRIEF [O.A.] Danielssen, D... C... Author: Danielssen, D... C... Recipient: Haeckel, Ernst Corporation: Bergens Museums Dating: 12.11.1882
BRIEF [O.A.] Danielssen, D... C... Author: Danielssen, D... C... Recipient: Haeckel, Ernst Corporation: Bergens Museums Dating: 15.03.1886