BRIEF OHNE UMSCHLAG Gross, Samuel D. Author: Gross, Samuel D. Recipient: Haeckel, Ernst Dating: ??.??.1876
BRIEF OHNE UMSCHLAG Frazer, Persifor Author: Frazer, Persifor Recipient: Haeckel, Ernst Dating: 13.03.1902
BRIEF OHNE UMSCHLAG Moore, J. Percy Author: Moore, J. Percy Recipient: Haeckel, Ernst Corporation: The Academy of Natural Sciences of Philadelphia
BRIEF OHNE UMSCHLAG Moore, J. Percy Author: Moore, J. Percy Recipient: Haeckel, Ernst Corporation: The Academy of Natural Sciences of Philadelphia Dating: 25.05.1911
BRIEF OHNE UMSCHLAG Frazer, Persifor Author: Frazer, Persifor Recipient: Haeckel, Ernst Dating: 02.05.1902
BRIEF OHNE UMSCHLAG Kish, Victor Emmanuel Author: Kish, Victor Emmanuel Recipient: Haeckel, Ernst Dating: 23.02.1914
BRIEF OHNE UMSCHLAG Golden, Henry; Levy, Simon [et al.] Author: Golden, Henry; Levy, Simon [et al.] Recipient: Haeckel, Ernst Corporation: The Rationalist Press Association Dating: 05.02.1909