1. Adler, R., Magistretti, P. J. Hyndman, A. G., and Shoemaker, W. J. (1982) Dev. Neurosci. 5, 27–39.
2. Agranoff, B. W., Field, P., and Gaze, R. M. (1976) Brain Res. 443, 225–244.
3. Aguilar, M., and Stiles, W. S. (1954) Optica Acta 1, 59–65.
4. Akhtar, M. (1983) Biochem. Soc. Trans. 11, 668–672.
5. Ames, A. III (1965) in Biochemistry of the Retina (C. N. Graymore, ed.), Academic Press, London, New York, pp. 22–25.