TY  - RPRT
TI  - Testing for hypermetropia in the school vision screening programme.
AU  - L Köhler
AU  - G Stigmar
PY  - 1981
DO  - 10.1111/j.1755-3768.1981.tb03002.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7324885/
ID  - 7324885
ER  -