TY  - RPRT
TI  - Dental calculus. A biophysical study.
AU  - A FORSBERG
AU  - C LAGERGREN
PY  - 1960
DO  - 10.1016/0030-4220(60)90317-0
UR  - https://pubmed.ncbi.nlm.nih.gov/13824018/
ID  - 13824018
ER  -