@misc{indiciaea27b43ee991a,
  title = {A constant-feed direct-current arc},
  author = {C. S. Annell and A.W. Helz},
  year = {1961},
  doi = {10.3133/b1084j},
  url = {https://pubs.usgs.gov/publication/b1084J},
  note = {Source identifier: b1084J}
}