@misc{indiciae53eb8e0c402a,
  title = {Astronomy using basic Mark 2 very long baseline interferometry},
  author = {Spencer, J. H. and Waltman, W. B. and Johnston, K. J. and Backer, D. C.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800020312},
  note = {Source identifier: 19800020312}
}