In number of words, who has the longest entry in "Who's Who"?

Dame Barbara Cartland listed each of her publications, many hundreds of books, in hers, together with a list of her other achievements; the result was one of the longest entries in the history of Who's Who.
http://www.answers.com/topic/who-s-who

Barbara Cartland was the best selling authoress in the world, and had held the world record for 18 years with an average of 23 books per annual. Not only did she write books, she was also an historian, playwright, lecturer, political speaker, and television personality.

Her various campaigns had evoked a Government enquiry into the "Housing and conditions of old people", had the law changed so that Gypsy children could go to school, and had local authorities to provide camps for their own Gypsies. She founded the National Association for Health in 1964, and her interest in health and vitamins also led her to write health books like The Magic of Honey.

https://en.wikipedia.org/wiki/Barbara_Cartland