@misc{indiciae61c3dc8545d0,
  title = {Frequencies of solar oscillations},
  author = {Libbrecht, K. G. and Woodard, M. F. and Kaufman, J. M.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910034867},
  note = {Source identifier: 19910034867}
}