RT Journal Article SR Electronic T1 Attention as a Concept in Neurophysiology JF Science JO Science FD American Association for the Advancement of Science SP 495 OP 496 DO 10.1126/science.163.3866.495 VO 163 IS 3866 A1 Evans, C. R. A1 Mulholland, T. B. YR 1969 UL http://science.sciencemag.org/content/163/3866/495.abstract AB