The first published work on creating speed-figures was E.W. Donaldson's Consistent Handicapping Profits (1936), which was cited by Jerry Brown as the method on which the Ragozin and Brown "sheet" figures are based.
E.W. Donaldson's book, "Consistent Handicapping Profits," published in 1936, served as a foundation for the speed-figure methodology used by Jerry Brown and his "sheet" figures, which were developed from Ragozin's work.