@misc{indiciaed06b76cf7ee7,
  title = {Search for microarcsecond structure in low-frequency variable radio sources},
  author = {Armstrong, J. W. and Spangler, S. R. and Hardee, P. E.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780026603},
  note = {Source identifier: 19780026603}
}