@misc{indiciae7a550c4bf54a,
  title = {Estimation of undiscovered deposits in quantitative mineral resource assessments-examples from Venezuela and Puerto Rico},
  author = {D. P. Cox},
  year = {1993},
  doi = {10.1007/bf02272805},
  url = {https://pubs.usgs.gov/publication/70018260},
  note = {Source identifier: 70018260}
}