1. Yamashita, U., and Shevach, E., J. Immunol. 119:1584, 1977.
2. Longo, D., and Schwartz, R., J. Exp. Med. 151:1452, 1980.
3. Steinman, R., Roqueira, N., Witmer, M., Tydings, J., and Mellman, S., J. Exp. Med. 152:1248, 1980.
4. Beller, D. I., and Unanue, E. R., J. Immunol. 126:263, 1981.
5. Beller, D. I., Kiely, J.-M., and Unanue, E. R., J. Immunol. 124:1426, 1980.