TY  - RPRT
TI  - Esthetic feasibility study using a labial index.
AU  - H A Williams
AU  - D L Koth
PY  - 1982
DO  - 10.1016/0022-3913(82)90134-2
UR  - https://pubmed.ncbi.nlm.nih.gov/7047725/
ID  - 7047725
ER  -