1990 USC esthetic dentistry symposium.

@article{Thanos19901990UE,
  title={1990 USC esthetic dentistry symposium.},
  author={Costas A. Thanos and Morton H. Friedman and Janice Sorensen and Robert R Winter and Stephen Boswell},
  journal={Journal of the California Dental Association},
  year={1990},
  volume={18 9},
  pages={13-7}
}