Schenkling, Sigmund (1865–1946)
Haeckel, Ernest (1834–1919)
Banzhaf, Walter (1901–1941)
Böttcher, G.
Nusbaum-Hilarowicz, Józef (1859–1917)
Alfken, J. D. (1862–1945)
Alfken, J. D. (1862–1945)
Alfken, J. D. (1862–1945)
Adolph, W. A. (1903–1941)
Fürst, Herman.
Haeckel, Ernest (1834–1919)
Haeckel, Ernest (1834–1919)
Ramsay, William (1852–1916)