@misc{indiciae8884d3b92317,
  title = {Imaging proportional counters for the stellar X-ray polarimeter},
  author = {Watkins, R. B., Jr. and Kaaret, P.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19920037611},
  note = {Source identifier: 19920037611}
}