@misc{indiciae0b207ddca7f8,
  title = {Digitized spark chamber for space science experiments},
  author = {Ehrmann, C. H. and Fichtel, C. E. and Kniffen, D. A. and Ross, R. W.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670007217},
  note = {Source identifier: 19670007217}
}