@misc{indiciaeb7bd2b15e679,
  title = {Scaling variables and interpretation of eigenvalues in principal component analysis of geologic data},
  author = {A.T. Miesch},
  year = {1980},
  doi = {10.1007/bf01034742},
  url = {https://pubs.usgs.gov/publication/70012352},
  note = {Source identifier: 70012352}
}