BRIEF [O.A.] Bessey, Charles E... Author: Bessey, Charles E... Recipient: Haeckel, Ernst Corporation: The University of Nebraska, Department of Botany Dating: 08.05.1909
BRIEF [O.A.] Kingsley, John Sterling Author: Kingsley, John Sterling Recipient: Haeckel, Ernst Corporation: State University Dating: 12.01.1890