@article{4787,
  author = {Douglas Gough and Juri Toomre},
  title = {Seismic Observations of the Solar Interior},
  year = {1991},
  journal = {Annual Review of Astronomy and Astrophysics},
  volume = {29},
  pages = {627-685},
  month = {1991-09},
  issn = {0066-4146},
  doi = {10.1146/annurev.aa.29.090191.003211},
}