Referenz SEEMANN, Berthold. NARRATIVE OF THE VOYAGE OF H. M. S. HERALD DURING THE YEARS 1845-51, UNDER THE COMMAND OF CAPTAIN HENRY KELLETT: BEING A CIRCUMNAVIGATION OF THE GLOBE, AND THREE CRUISES TO THE ARCTIC REGIONS IN SEARCH OF SIR JOHN FRANKLIN. Londres, Inglaterra: Reeve and Co., 1853.