@misc{indiciae6921fe5051f6,
  title = {Upper limit on X-rays from a new supernova.},
  author = {Boldt, E. and Bradt, H. and Naranan, S. and Ogelman, H. and Rappaport, S. and Zwicky, F.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680050596},
  note = {Source identifier: 19680050596}
}