Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The 2006 World Thoroughbred Racehorse Rankings is the 2006 edition of the World Thoroughbred Racehorse Rankings. It is an assessment of racehorses which was issued by the International Federation of Horseracing Authorities (IFHA) in January 2007. It includes horses aged three or older which raced or were trained during 2006 in countries where the flat racing year runs from January 1 to December 31. These countries are generally in the Northern Hemisphere.

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