@misc{indiciae61959eebce66,
  title = {An improved binocular magnifier.},
  author = {W B HUBBARD},
  year = {1959},
  doi = {10.1001/archopht.1959.00940090143020},
  url = {https://pubmed.ncbi.nlm.nih.gov/13605349/},
  note = {Source identifier: 13605349}
}