@misc{indiciae26d22e83cd92,
  title = {Sampling errors in the estimation of empirical orthogonal functions},
  author = {North, G. R. and Bell, T. L. and Cahalan, R. F. and Moeng, F. J.},
  year = {1982},
  url = {https://ntrs.nasa.gov/citations/19820059446},
  note = {Source identifier: 19820059446}
}