BRIEF OHNE UMSCHLAG Burdon-Sanderson, Ghetal Author: Burdon-Sanderson, Ghetal Recipient: Haeckel, Ernst Dating: 05.01.1877
BRIEF OHNE UMSCHLAG Pfeiffer, Jurgen Edward Author: Pfeiffer, Jurgen Edward Recipient: Haeckel, Ernst
BRIEF OHNE UMSCHLAG Paul, C. Kegan Author: Paul, C. Kegan Recipient: Haeckel, Ernst Corporation: Henry S. King & Co. Publishers Dating: 08.04.1876
BRIEF OHNE UMSCHLAG Paul, C. Kegan Author: Paul, C. Kegan Recipient: Haeckel, Ernst Dating: 25.09.1879
BRIEF OHNE UMSCHLAG Paul, C. Kegan Author: Paul, C. Kegan Recipient: Haeckel, Ernst Corporation: C. Kegan Paul & Co. Publishers Dating: 09.09.1880