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Clifton K. Hillegass (18 April 1918 – 5 May 2001) was the creator and publisher of CliffsNotes.[1][2]
- ^ Oliver, Myrna (7 May 2001). "Clifton Hillegass; Built Cliffs Notes into Multimillion-Dollar Business". Los Angeles Times.
- ^ Dewan, Shaila K. (7 May 2001). "Clifton Keith Hillegass Dies; Cliffs Notes Creator Was 83". The New York Times.