RT Journal Article SR Electronic T1 THE TERM "INVERSION" JF Science JO Science FD American Association for the Advancement of Science SP 544 OP 546 DO 10.1126/science.50.1302.544 VO 50 IS 1302 A1 Ferguson, J. B. YR 1919 UL http://science.sciencemag.org/content/50/1302/544.abstract AB