TY  - RPRT
TI  - Work with magnifying glasses.
AU  - H Krueger
AU  - P Conrady
AU  - J Zülch
PY  - 1989
DO  - 10.1080/00140138908966842
UR  - https://pubmed.ncbi.nlm.nih.gov/2806219/
ID  - 2806219
ER  -