TY  - RPRT
TI  - Supragingival calculus: formation and control.
AU  - Ye Jin
AU  - Hak-Kong Yip
PY  - 2002
DO  - 10.1177/154411130201300506
UR  - https://pubmed.ncbi.nlm.nih.gov/12393761/
ID  - 12393761
ER  -