@misc{indiciae09cbac68594c,
  title = {X-ray observations of X Persei},
  author = {Weisskopf, M. C. and Elsner, R. F. and Darbro, W. and Naranan, S. and Williams, A. and Weisskopf, V. J. and White, N. E. and Grindlay, J. E. and Sutherland, P. G.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19840046416},
  note = {Source identifier: 19840046416}
}