BRIEF [O.A.] Greil, Alfred Author: Greil, Alfred Recipient: Haeckel, Ernst Corporation: K. K. Anatomisches Institut zu Innsbruck Dating: 22.12.1911
BRIEF [O.A.] Greil, Alfred Author: Greil, Alfred Recipient: Haeckel, Ernst Corporation: K. K. Anatomisches Institut zu Innsbruck Dating: 14.02.1912
BRIEF [O.A.] Greil, Alfred Author: Greil, Alfred Recipient: Haeckel, Ernst Corporation: K. K. Anatomisches Institut zu Innsbruck Dating: 08.03.1912
BRIEF [O.A.] Greil, Alfred Author: Greil, Alfred Recipient: Haeckel, Ernst Corporation: K. K. Anatomisches Institut zu Innsbruck Dating: 23.04.1912
BRIEF [O.A.] Greil, Alfred Author: Greil, Alfred Recipient: Haeckel, Ernst Corporation: K. K. Anatomisches Institut zu Innsbruck Dating: 14.11.1912