Wade-Dahl-Till valve was partially built by the novelist of what nationality?
Roald Dahl Roald Dahl ( , ] ; 13 September 1916 – 23 November 1990) was a British novelist, short story writer, poet, screenwriter, and fighter pilot. His books have sold more than 250 million copies worldwide.
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".