@misc{indiciaee7da0256cb35,
  title = {U.S. Geological Survey heavy metals program progress report, 1966 and 1967},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1968},
  doi = {10.3133/cir560},
  url = {https://pubs.usgs.gov/publication/cir560},
  note = {Source identifier: cir560}
}