TY  - RPRT
TI  - A phantom head for teaching dental radiography.
AU  - R E Clarke
AU  - N J Smith
PY  - 1970
DO  - 10.1016/0030-4220(70)90163-5
UR  - https://pubmed.ncbi.nlm.nih.gov/4195513/
ID  - 4195513
ER  -