BRIEF [O.A.] Griffith, Walter S... Author: Griffith, Walter S... Recipient: Haeckel, Ernst Dating: 25.01.1915
BRIEF [O.A.] Dealey, James Quayle Author: Dealey, James Quayle Recipient: Haeckel, Ernst Corporation: Brown University, Department of Social and Political Science Dating: 30.04.1913
BRIEF OHNE UMSCHLAG Packard, Alpheus Spring Author: Packard, Alpheus Spring Recipient: Haeckel, Ernst Corporation: Brown University Dating: 29.12.1901
BRIEF [O.A.] Philips, Geo... Morris Author: Philips, Geo... Morris Recipient: Haeckel, Ernst Corporation: State Normal School Dating: 19.09.1895
BRIEF [O.A.] Packard, Alpheus S... Author: Packard, Alpheus S... Recipient: Haeckel, Ernst Dating: 27.02.1889
BRIEF [O.A.] Packard, Alpheus S... Author: Packard, Alpheus S... Recipient: Haeckel, Ernst Dating: 20.11.1901
BRIEF [O.A.] Packard, Alpheus S... Author: Packard, Alpheus S... Recipient: Haeckel, Ernst Dating: 16.11.1903