@misc{indiciae25150089706c,
  title = {Comet Encke: Meteor metallic ion identification by mass spectrometer},
  author = {Goldberg, R. A. and Aikin, A. C.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730003128},
  note = {Source identifier: 19730003128}
}