@misc{indiciaebee41a30d669,
  title = {Areal lithologic changes in bedrock aquifers in southeastern Minnesota as determined from natural-gamma borehole logs methods},
  author = {D. G. Woodward},
  year = {1984},
  url = {https://pubs.usgs.gov/publication/70175808},
  note = {Source identifier: 70175808}
}