Multidisciplinary perspectives in event-related brain potential research: Proceedings of the Fourth International Congress on Event-Related Slow Potentials of the Brain (EPIC IV), Hendersonville, North Carolina, April 4–10, 1976. Edited by David A. Otto and Biological Sciences Research Center (sic). U.S. Environmental Protection Agency, Office of Research and Development, Environmental Research Information Center, Cincinnati, Ohio, Publication No. EPA-600 977043, December 1978, Paperback, 670 pp. + illustrations