TY  - RPRT
TI  - Root surface measurement using a digital computer.
AU  - J I Nicholls
AU  - C H Daly
AU  - W L Kydd
DO  - 10.1177/00220345740530060701
UR  - https://pubmed.ncbi.nlm.nih.gov/4529921/
ID  - 4529921
ER  -