TY  - RPRT
TI  - Refraction in ophthalmology.
AU  - R Hertzberg
PY  - 1989
DO  - 10.1111/j.1442-9071.1989.tb00523.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2803767/
ID  - 2803767
ER  -