TY  - RPRT
TI  - A time-marking device for serial radiographs.
AU  - S Klevenhagen
AU  - R B Pridie
PY  - 1967
DO  - 10.1259/0007-1285-40-474-470
UR  - https://pubmed.ncbi.nlm.nih.gov/6026462/
ID  - 6026462
ER  -