Riferimento GREY, George. JOURNALS OF TWO EXPEDITIONS OF DISCOVERY IN NORTH-WEST AND WESTERN AUSTRALIA, DURING THE YEARS 1837, 38, AND 39, UNDER THE AUTHORITY OF HER MAJESTY´S GOVERNMENT: DESCRIBING MANY NEWLY DISCOVERED, IMPORTANT, AND FERTILE DISTRICTS, WITH OBSERVATIONS ON THE MORAL AND PHYSICAL CONDITION OF THE ABORIGINAL INHABITANTS, ETC. ETC.. Londres, Inglaterra: T. and W. Boone, 1841.