@misc{indiciae4e6e199ee198,
  title = {The mineral position of Guatemala in 1961, with special reference to industrial minerals},
  author = {Ralph L. Miller},
  year = {1965},
  doi = {10.3133/ofr65110},
  url = {https://pubs.usgs.gov/publication/ofr65110},
  note = {Source identifier: ofr65110}
}