TY  - RPRT
TI  - Caries progression and activity in approximal tooth surfaces. A longitudinal study.
AU  - D S Berman
AU  - G L Slack
PY  - 1973
DO  - 10.1038/sj.bdj.4802958
UR  - https://pubmed.ncbi.nlm.nih.gov/4145948/
ID  - 4145948
ER  -