@misc{indiciae1897edeabc70,
  title = {Microbial distributions, activities, and movement in the terrestial subsurface: Experimental and theoretical studies},
  author = {Ronald W. Harvey and M.A. Widdowson},
  year = {1992},
  url = {https://pubs.usgs.gov/publication/70199813},
  note = {Source identifier: 70199813}
}