@misc{indiciae9881e79fce20,
  title = {QADATA user's manual; an interactive computer program for the retrieval and analysis of the results from the external blind sample quality- assurance project of the U.S. Geological Survey},
  author = {K.J. Lucey},
  year = {1990},
  doi = {10.3133/ofr90162},
  url = {https://pubs.usgs.gov/publication/ofr90162},
  note = {Source identifier: ofr90162}
}