BRIEF [O.A.] Georgy, Ernst August Author: Georgy, Ernst August Recipient: Haeckel, Ernst Dating: 26.01.1911
POSTKARTE Georgy, Ernst August Author: Georgy, Ernst August Recipient: Haeckel, Ernst Dating: 17.05.1911
BRIEF [O.A.] Genthe-Schäck, H... Author: Genthe-Schäck, H... Recipient: Haeckel, Ernst Corporation: Literaturbund 1901 Dating: 12.08.1911
BRIEF [O.A.] Gierlichs, Florentine Author: Gierlichs, Florentine Recipient: Haeckel, Ernst Dating: 17.09.1911
BRIEF [O.A.] Gierlichs, Florentine Author: Gierlichs, Florentine Recipient: Haeckel, Ernst Dating: 16.11.1911
TELEGRAMM Rosa, Daniele; Giglio-Tos, Ermanno Author: Rosa, Daniele; Giglio-Tos, Ermanno Recipient: Haeckel, Ernst Corporation: Museo Zoologico Firenze Dating: 19.05.1911