@misc{indiciaea61998cae7f5,
  title = {The Seamless Integrated Geologic Mapping (SIGMa) extension to the Geologic Map Schema (GeMS)},
  author = {Kenzie J. Turner and Jeremiah B. Workman and Joseph P. Colgan and Amy K. Gilmer and Margaret E. Berry and Samuel Johnstone and Kathleen F. Warrell and Marieke Dechesne and D. Paco VanSistine and Ren A. Thompson and Adam M. Hudson and Kristine L. Zellman and Donald S. Sweetkind and Chester A. Ruleman},
  year = {2022},
  doi = {10.3133/sir20225115},
  url = {https://pubs.usgs.gov/publication/sir20225115},
  note = {Source identifier: sir20225115}
}