BRIEF [O.A.] Loeb, Jacques Author: Loeb, Jacques Recipient: Haeckel, Ernst Corporation: The Rockefeller Institute for Medical Research Dating: 22.05.1912
BRIEF OHNE UMSCHLAG Loeb, Jacques Author: Loeb, Jacques Recipient: Haeckel, Ernst Corporation: The Rockefeller Institute for Medical Research Dating: 15.12.1911