What year was the author of The Art of Thinking born?
Rolf Dobelli Rolf Dobelli (born July 15, 1966 in Luzern, Switzerland) is a Swiss author and businessman.
Margaret Naumburg Margaret Naumburg (May 14, 1890 – February 26, 1983) was an American psychologist, educator, artist, author and among the first major theoreticians of art therapy. She named her approach dynamically oriented art therapy. Prior to working in art therapy, she founded the Walden School of New York City.