@misc{indiciaeb0affdf7f4bf,
  title = {Reference wedge for Schlieren diagrams.},
  author = {H HOCH},
  year = {1950},
  doi = {10.1038/166402a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/14775685/},
  note = {Source identifier: 14775685}
}