@misc{indiciae17decc760307,
  title = {A Photo-Ionization Experiment with Hydrogen.},
  author = {F L Mohler},
  year = {1926},
  doi = {10.1073/pnas.12.8.494},
  url = {https://pubmed.ncbi.nlm.nih.gov/16587115/},
  note = {Source identifier: 16587115}
}