1. Eylar, E. H., Salk, J., Beveridge, G., and Brown, L., Arch. Biochem. Biophys., 132, 34 (1969).
2. Adams, C., and Liebowitz, S., in The Structure and Function of Nervous Tissue (edit. by Bourne, G.), 3, 309 (Academic Press, New York, 1969).
3. Paterson, P., Adv. Immunol., 5, 131 (1966).
4. Alvord, E., in Handbook of Clinical Neurology, (edit. by Vinken, P., and Bruyn, G.), 9, 500 (North-Holland, Amsterdam, 1970).
5. Roboz-Einstein, E., Robertson, D., Di Caprio, J., and Moore, W., J. Neurochem., 9, 353 (1962).