TY  - RPRT
TI  - [Keratinization and toothbrushing: histological study].
AU  - C Hirsch
AU  - G Cimasoni
AU  - A J Held
PY  - 1967
UR  - https://pubmed.ncbi.nlm.nih.gov/4167224/
ID  - 4167224
ER  -