TY  - RPRT
TI  - [A new periodontal chart adapted to practice and electronic data processing].
AU  - W D Grimm
AU  - H G Schneider
AU  - H Nossek
AU  - K Gäbler
PY  - 1976
UR  - https://pubmed.ncbi.nlm.nih.gov/785706/
ID  - 785706
ER  -