Publisher: PAN Books, No. X463,1962, 219 pgs. Science Fiction Stories by Scientists. Mass Market Paperback in good condition, heavy scuffing to the covers with edgewear and a slight tilt to the right. Stories from: O. R. Frisch, Leo Szilard, Fred Hoyle, George Gamow, Isaac Asimov, W. Grey Walter, Norbert Wiener.