1. Hofmann, A., Ind. J. Pharm., 25, 245 (1963).
2. Fischer, R., Griffin, F., and Liss, L., Ann. N.Y. Acad. Sci., 96, 44 (1962).
3. Stroud, J. M., in Information Theory in Psychology, edit. by Quastler, H. (The Free Press, Glencoe, 1955).
4. Hofmann, A., Triangle (Sandoz), 2, 117 (1955).
5. Delay, P., et al., in Les Champignons Hallucinogénes du Mexigue, edit. by Heim, R., and Wasson, R. G. (Arch. Mus. Nat. d'Hist. Nat., Paris, 1958).