RT Journal Article SR Electronic T1 Basic Research in Materials JF Science JO Science FD American Association for the Advancement of Science SP 647 OP 650 DO 10.1126/science.191.4228.647 VO 191 IS 4228 A1 Huggins, Robert A. YR 1976 UL http://science.sciencemag.org/content/191/4228/647.abstract AB