BRIEF [O.A.] Cardiff, Ira D... Author: Cardiff, Ira D... Recipient: Haeckel, Ernst Corporation: The State College of Washington, Agricultural Experiment Station Dating: 08.12.1913
BRIEF [O.A.] Freeman, W... L... Author: Freeman, W... L... Recipient: Haeckel, Ernst Corporation: W. L. Freeman, M. D., Physician & Surgeon Dating: 02.12.1912
BRIEF [O.A.] Barnard, William Stebbins Author: Barnard, William Stebbins Recipient: Haeckel, Ernst Corporation: Department of Agriculture, Division of Entomology Dating: 10.07.1885
BRIEF [O.A.] Reynoldt, William P... Author: Reynoldt, William P... Recipient: Haeckel, Ernst Dating: 15.02.1915