August Sonntag

• Observations on terrestrial magnetism in Mexico
• Professor Sonntag's Thrilling Narrative Of The Grinnell Exploring Expedition To The Arctic Ocean 1853-1855, In Search Of Sir John Franklin
• Professor Sonntag's thrilling narrative of the Grinnell Exploring Expedition to the Arctic Ocean, in the years 1853, 1854, and 1855
• Professor Sonntag's thrilling narrative of the Grinnell Exploring Expedition to the Arctic Ocean, in the years 1853, 1854, and 1855
• Professor Sonntag's thrilling narrative of the Grinnell exploring expedition to the Arctic Ocean, in the years 1853, 1854, and 1855, in search of Sir John Franklin, under the command of Dr. E. K. Kane ...
• Conmovedora narración del viaje de la comisión exploradora "Grinnell" al océano ártico
• Messungen von Dissoziationsdrucken an Nitraten und Sulfaten
• Professor Sonntag's thrilling narrative of the Grinnell Exploring Expedition
• Professor Sonntag's thrilling narrative of the Grinnell Exploring Expedition to the Arctic Ocean, in the years 1853, 1854, and 1855
• Professor Sonntag's thrilling narrative of the Grinnell exploring expedition to the Arctic Ocean, in the years 1853, 1854, and 1855, in search of Sir John Franklin, under the command of Dr. E.K. Kane ..
• Professor Sonntag's thrilling narrative of the Grinnell exploring expedition to the Artic ocean