TY  - RPRT
TI  - Surface changes in enamel.
AU  - B R BHUSSRY
AU  - B G BIBBY
PY  - 1957
DO  - 10.1177/00220345570360031401
UR  - https://pubmed.ncbi.nlm.nih.gov/13428899/
ID  - 13428899
ER  -