@misc{indiciae05cb2f56f203,
  title = {Nature to be commanded...Earth-science maps applied to land and water management},
  author = {Andrew Maute Spieker},
  year = {1978},
  doi = {10.3133/pp950},
  url = {https://pubs.usgs.gov/publication/pp950},
  note = {Source identifier: pp950}
}