BRIEF [O.A.] Harperath, Ludw... Author: Harperath, Ludw... Recipient: Haeckel, Ernst Corporation: Universidad de Cordoba Dating: 20.12.1903
BRIEF OHNE UMSCHLAG Quevedo, Francisco A. Lafone; Outes, Félix Faustino Author: Quevedo, Francisco A. Lafone; Outes, Félix Faustino Recipient: Haeckel, Ernst Corporation: Museo de La Plata Dating: 09.02.1909