"Karl Ralph Spangenberg"@en . . . . . . . . . "Karl Spangenberg was an American engineer, social scientist, academic, futurist, writer, and visionary. He was adviser of numerous outstanding scientists in Stanford University including Willis Harman, Robert Helliwell, and Chih-Tang Sah. His PhD adviser was William Littell Everitt, a founding member of the National Academy of Engineering."@en .