@misc{indiciaea6d5ab56de7f,
  title = {Reduction and complexing of manganese gallic acids},
  author = {John David Hem},
  year = {1965},
  doi = {10.3133/wsp1667d},
  url = {https://pubs.usgs.gov/publication/wsp1667D},
  note = {Source identifier: wsp1667D}
}