BRIEF [O.A.] Palmén, Johan Axel Author: Palmén, Johan Axel Recipient: Haeckel, Ernst Dating: 11.02.1892
BRIEF [O.A.] Palmén, Johan Axel Author: Palmén, Johan Axel Recipient: Haeckel, Ernst Dating: 05.01.1894
BRIEF [O.A.] Palmén, Johan Axel Author: Palmén, Johan Axel Recipient: Haeckel, Ernst Dating: 10.06.1899
BRIEF [O.A.] Palmén, Johan Axel Author: Palmén, Johan Axel Recipient: Haeckel, Ernst Dating: 05.04.1904
BRIEF OHNE UMSCHLAG Palmén, Johan Axel Author: Palmén, Johan Axel Recipient: [Pohle, Franz] Corporation: Zoologisches Museum der Universität Helsingfors Dating: 27.01.1892