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.
Robert C. O'Brien (author) Robert Leslie Carroll Conly (January 11, 1918 – March 5, 1973), better known by pen name Robert C. O'Brien, was an American novelist and a journalist for "National Geographic Magazine".