BRIEF [O.A.] Wolf, Adolf Author: Wolf, Adolf Recipient: Haeckel, Ernst Corporation: Jenaer Volksblatt, Redaktion Dating: 06.03.1917
BRIEF [O.A.] Wolf, Adolf Author: Wolf, Adolf Recipient: Haeckel, Ernst Corporation: Jenaer Volksblatt Dating: 01.12.1905
BRIEF [O.A.] Wolf, Adolf Author: Wolf, Adolf Recipient: Haeckel, Ernst Corporation: Jenaer Volksblatt Dating: 15.06.1908
BRIEF [O.A.] Wolf, Adolf Author: Wolf, Adolf Recipient: Haeckel, Ernst Corporation: Jenaer Volksblatt, Redaktion Dating: 08.10.1914
BRIEF [O.A.] Wolf, Adolf Author: Wolf, Adolf Recipient: Haeckel, Ernst Corporation: Jenaer Volksblatt, Redaktion Dating: 01.12.1908