Analysis of the LSD Flashback Journal of Psychedelic Drugs September 1, 1970 J. Fred E. Shick, David E. Smith 48 citations (1970). Analysis of the LSD Flashback. Journal of Psychedelic Drugs: Vol. 3, LSD. The Psychedelic Experience and Beyond, pp. 13-19. DOI: 10.1080/02791072.1970.10471357 (opens in new tab) Flashback