@misc{indiciae6e301e603cc8,
  title = {Comments on the observability of coronal variations},
  author = {Golub, L. and Hartquist, T. W. and Quillen, A. C.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900063263},
  note = {Source identifier: 19900063263}
}