@misc{indiciae52dddb001a3e,
  title = {High-resolution X-ray spectroscopy of four active galaxies - Probing the intercloud medium},
  author = {Lum, Kenneth S. K. and Canizares, Claude R. and Markert, Thomas H. and Arnaud, Keith A.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900054783},
  note = {Source identifier: 19900054783}
}