by Alexander von Humboldt
by Alexander von Humboldt
by Alexander von Humboldt
by Aimé Bonpland , Alexander von Humboldt
by Aimé Bonpland , Alexander von Humboldt
by Aimé Bonpland , Alexander von Humboldt
by Alexander von Humboldt
by Robert Fitzroy , Philip Parker King
by William Henry Giles Kingston
by Leo E. (Leo Edward) Miller