BRIEF OHNE UMSCHLAG Bender, Albert M. Author: Bender, Albert M. Recipient: Haeckel, Ernst Dating: 15.05.1911
BRIEF OHNE UMSCHLAG WPT Author: WPT Recipient: Haeckel, Ernst Corporation: The Edison Electric Company Los Angeles, California - Southern California Edison Company Dating: 09.10.1909
BRIEF OHNE UMSCHLAG Darling, Ernest Willing Author: Darling, Ernest Willing Recipient: Haeckel, Ernst Dating: 22.09.1913
BRIEF OHNE UMSCHLAG Mitchell, George Otis Author: Mitchell, George Otis Recipient: Haeckel, Ernst Corporation: San Francisco Microscopical Society Dating: 03.01.1893
BRIEF OHNE UMSCHLAG Mitchell, George Otis Author: Mitchell, George Otis Recipient: Haeckel, Ernst Corporation: San Francisco Microscopical Society Dating: 07.12.1893
BRIEF OHNE UMSCHLAG Scheffauer, Herman Author: Scheffauer, Herman Recipient: Haeckel, Ernst Dating: 13.01.1909
BRIEF OHNE UMSCHLAG Scheffauer, Herman Author: Scheffauer, Herman Recipient: Haeckel, Ernst Dating: 13.04.1909
BRIEF OHNE UMSCHLAG Scheffauer, Herman Author: Scheffauer, Herman Recipient: Haeckel, Ernst Dating: 31.05.1909
BRIEF OHNE UMSCHLAG Belford, Robert J. Author: Belford, Robert J. Recipient: Haeckel, Ernst Corporation: Belford & Company Publishers Dating: 16.12.1912