Wade-Dahl-Till valve was partially built by the novelist of what nationality?
Wade-Dahl-Till valve The Wade-Dahl-Till (WDT) valve is a cerebral shunt developed in 1962 by hydraulic engineer Stanley Wade, author Roald Dahl, and neurosurgeon Kenneth Till.
Fletcher Pratt Murray Fletcher Pratt (25 April 1897 – 10 June 1956) was an American writer of science fiction, fantasy and history. He is best known for his works on naval history and on the American Civil War and for fiction written with L. Sprague de Camp.