@misc{indiciae9b4705e5964c,
  title = {A 500-volt pulse transmitter for ice sounding},
  author = {Charles J. Roubique},
  year = {1978},
  doi = {10.3133/ofr78372},
  url = {https://pubs.usgs.gov/publication/ofr78372},
  note = {Source identifier: ofr78372}
}