Lancaster, American Physical Society, 1947. Lex8vo. Bound in recent black half cloth with the original green wrappers. Small library stamp to front wrapper. A very fine and clean copy. Pp. 193-96. [Entire issue: 189-261].
First printing of Fermi's paper in which he presented his thermal neutron velocity selector designed at the Los Alamos Laboratory.
Order-nr.: 44868