@misc{indiciae6a7f24eb6d32,
  title = {Exploratory drilling program of the U.S. Geological Survey for evidences of zinc-lead mineralization in Iowa and Wisconsin, 1950-51},
  author = {Allen Francis Agnew and Arthur E. Flint and John W. Allingham},
  year = {1953},
  doi = {10.3133/cir231},
  url = {https://pubs.usgs.gov/publication/cir231},
  note = {Source identifier: cir231}
}