Are León Klimovsky and Roger Avary both screenwriters?
León Klimovsky León Klimovsky (16 October 1906–8 April 1996) was an Argentine film director, screenwriter and film producer.
Leon Stover Leon Eugene Stover (April 9, 1929 – November 25, 2006) was an anthropologist, a Sinologist, and a science fiction fan, who wrote both fiction and nonfiction. He was a scholar of the works of H. G. Wells and Robert A. Heinlein and a frequent collaborator with Harry Harrison.