@misc{indiciae7dd39a7d454e,
  title = {An improved liquid nitrogen level sensor.},
  author = {P W Nicholson},
  year = {1979},
  doi = {10.1088/0022-3735/12/7/007},
  url = {https://pubmed.ncbi.nlm.nih.gov/469710/},
  note = {Source identifier: 469710}
}