@misc{indiciae71c4174eb050,
  title = {An early solar dynamo prediction: Cycle 23 is approximately cycle 22},
  author = {Schatten, Kenneth H. and Pesnell, W. Dean},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19950047865},
  note = {Source identifier: 19950047865}
}