@misc{indiciae02af3775ca86,
  title = {Work with magnifying glasses.},
  author = {H Krueger and P Conrady and J Zülch},
  year = {1989},
  doi = {10.1080/00140138908966842},
  url = {https://pubmed.ncbi.nlm.nih.gov/2806219/},
  note = {Source identifier: 2806219}
}