Hoffmann, Roald Chemistry imagined : reflections on science / Roald Hoffmann and Vivian Torrence ; with a foreword by Carl Sagan and a commentatry by Lea Rosson DeLong - Washington : Smithsonian Institution Press, 1993 - 168 p. : ill. ; 25 cm. ISBN: 1560982144 RM87.90 Subjects--Topical Terms: Chemistry