TY  - RPRT
TI  - New visual acuity test for pre-school children.
AU  - L Hyvärinen
AU  - R Näsänen
AU  - P Laurinen
PY  - 1980
DO  - 10.1111/j.1755-3768.1980.tb08291.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7211248/
ID  - 7211248
ER  -