@misc{indiciae1bc5538a66c9,
  title = {[Windowless Geiger counter for weak beta-rays].},
  author = {P SEPPALA and E KULONEN},
  year = {1958},
  url = {https://pubmed.ncbi.nlm.nih.gov/13619523/},
  note = {Source identifier: 13619523}
}