@misc{indiciaea22f6828cb72,
  title = {A simply constructed and adjustable mercury vapor cell mount},
  author = {J.W. Ball and E. A. Jenne},
  year = {1972},
  doi = {10.1007/bf01684462},
  url = {https://pubs.usgs.gov/publication/70001468},
  note = {Source identifier: 70001468}
}