TY  - RPRT
TI  - Grenz rays: adequate or antiquated?
AU  - G T Jansen
PY  - 1978
DO  - 10.1111/j.1524-4725.1978.tb00513.x
UR  - https://pubmed.ncbi.nlm.nih.gov/151105/
ID  - 151105
ER  -