1. Smith, D. J. and Taubman, M. A., J. Dent. Res. 55: C193, 1976.
2. Bowen, W. H., Brit. Dent. J. 126: 159, 1969.
3. Emmings, F. G., Evans, R. T. and Genco, R. J., Infect. Immun. 12: 281, 1975.
4. Evans, R. T., Emmings, F. G. and Genco, R. J., Infect. Immun. 12: 293, 1975.
5. Genco, R. J., in The Secretory Immunologic System (Edited by Dayton, D.H.J., Small, P. A., Kaufman, H. E. and Tomasi, T. B., Jr.), U.S. Govt. Printing Office, Washington, D. C., 1971.