RT Journal Article SR Electronic T1 Matter and Light JF Science JO Science FD American Association for the Advancement of Science SP 373 OP 373 DO 10.1126/science.90.2338.373 VO 90 IS 2338 A1 Swann, W. F. G. YR 1939 UL http://science.sciencemag.org/content/90/2338/373.1.abstract AB