@misc{indiciae902f1616f3fe,
  title = {Geophysical, archaeological and historical evidence support a solar-output model for climate change},
  author = {C. A. Perry and K.J. Hsu},
  year = {2000},
  doi = {10.1073/pnas.230423297},
  url = {https://pubs.usgs.gov/publication/70022296},
  note = {Source identifier: 70022296}
}