1. Gajdusek, D. C., and Gibbs, jun., C. J., Nature, 204, 257 (1964).
2. Palsson, P. A., Pattison, I. H., and Field, E. J., in Slow, Latent and Temperate Virus Infections, edit. by Gajdusek, D. C., Gibbs, jun, C. J., and Alpers, M., Nat. Inst. Neurol. Dis. Blind. Mono. No. 2, U.S. Pub. Health Serv. (U.S. Govt. Print. Office, Washington, 1965).
3. Gajdusek, D. C., Gibbs, jun., C. J., and Alpers, M., in ref. 2.
4. Gajdusek, D. C., in ref. 2.
5. Gibbs, jun., C. J., and Gajdusek, D. C., in ref. 2.