BRIEF [O.A.] Schaxel, Julius Author: Schaxel, Julius Recipient: Haeckel, Ernst Corporation: Station Zoologique de Wimereux Dating: 16.08.1908
BRIEF [O.A.] Schaxel, Julius Author: Schaxel, Julius Recipient: Haeckel, Ernst Corporation: Station Zoologique de Wimereux Dating: 06.09.1908
BRIEF [O.A.] Schaxel, Julius Author: Schaxel, Julius Recipient: Haeckel, Ernst Corporation: Station Zoologique de Wimereux Dating: 08.09.1908