BRIEF OHNE UMSCHLAG Hertwig, Oscar Author: Hertwig, Oscar Recipient: Haeckel, Ernst Dating: 10.11.1904
BRIEF OHNE UMSCHLAG Hertwig, Oscar Author: Hertwig, Oscar Recipient: Haeckel, Ernst Dating: 20.11.1901
BRIEF OHNE UMSCHLAG Hertwig, Oscar Author: Hertwig, Oscar Recipient: Haeckel, Ernst Dating: 14.02.1904
BRIEF OHNE UMSCHLAG Hertwig, Oscar Author: Hertwig, Oscar Recipient: Haeckel, Ernst Dating: 17.07.1908
BRIEF OHNE UMSCHLAG Magnussen, Harro Author: Magnussen, Harro Recipient: Haeckel, Ernst Dating: 18.06.1902
BRIEF OHNE UMSCHLAG Magnussen, Harro Author: Magnussen, Harro Recipient: Haeckel, Ernst Dating: 18.04.1903
BRIEF OHNE UMSCHLAG Magnussen, Harro Author: Magnussen, Harro Recipient: Haeckel, Ernst Dating: 03.04.1905
BRIEF OHNE UMSCHLAG Magnussen, Harro Author: Magnussen, Harro Recipient: Haeckel, Ernst Dating: 12.02.1906
BRIEF OHNE UMSCHLAG Magnussen, Harro Author: Magnussen, Harro Recipient: Haeckel, Ernst Dating: 19.09.1906
BRIEF OHNE UMSCHLAG Magnussen, Harro Author: Magnussen, Harro Recipient: Haeckel, Ernst Dating: 09.12.1906
