@misc{indiciaecbf27ef15bd8,
  title = {Milankovitch radiation variations - A quantitative evaluation.},
  author = {Donn, W. L. and Shaw, D. M.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690036243},
  note = {Source identifier: 19690036243}
}