@misc{indiciae374dfa9aed88,
  title = {A new type of hand knobs for the surgical microscope.},
  author = {O HALLEN},
  year = {1962},
  doi = {10.3109/00016486209126937},
  url = {https://pubmed.ncbi.nlm.nih.gov/13903926/},
  note = {Source identifier: 13903926}
}