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Chinese character radical
For the four stroke tooth radical, see Radical 92.
Fazzioli, Edoardo (1987). Chinese calligraphy : from pictograph to ideogram : the history of 214 essential Chinese/Japanese characters. calligraphy by Rebecca Hon Ko. New York: Abbeville Press. ISBN0-89659-774-1.
Leyi Li: "Tracing the Roots of Chinese Characters: 500 Cases". Beijing 1993, ISBN978-7-5619-0204-2