@misc{indiciae964fd6ee80bd,
  title = {Search for gamma rays from 3C 273 and M 87.},
  author = {Frye, G. M., Jr. and Wang, C. P.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680060435},
  note = {Source identifier: 19680060435}
}