Patrick O'Brien's Grand Prix Rating System Season Summaries 1894-1899
Patrick O'Brien's Grand Prix Rating System Season Summaries 1940-49
Patrick O'Brien's Grand Prix Rating System Season Summaries 1910-1919
Patrick O'Brien's Grand Prix Rating System Season Summaries 2000-2009
Patrick O'Brien's Grand Prix Rating System Explanatory Chapters 1894-2013
Patrick O'Brien's Grand Prix Rating System Explanatory Chapters 1980-1989
