@misc{indiciae94078f4de252,
  title = {Activity of Paricutin Volcano from July 1 to December 31, 1949},
  author = {Carl Fries and Celedonio Gutierrez},
  year = {2014},
  doi = {10.1029/tr031i005p00732},
  url = {https://pubs.usgs.gov/publication/70215343},
  note = {Source identifier: 70215343}
}