@misc{indiciae1a5bfc10a048,
  title = {Hydrologic Drought of Water Year 2006 Compared with Four Major Drought Periods of the 20th Century in Oklahoma},
  author = {Robert L. Tortorelli},
  year = {2008},
  doi = {10.3133/sir20085199},
  url = {https://pubs.usgs.gov/publication/sir20085199},
  note = {Source identifier: sir20085199}
}