TY  - RPRT
TI  - Ultrastructural study on human root caries.
AU  - R M Frank
AU  - P Steuer
AU  - J Hemmerle
PY  - 1989
DO  - 10.1159/000261180
UR  - https://pubmed.ncbi.nlm.nih.gov/2790852/
ID  - 2790852
ER  -