@misc{indiciae5199a344db63,
  title = {Structures data collection for the national map using volunteered geographic information},
  author = {Barbara S. Poore and Eric B. Wolf and Erin M. Korris and Jennifer L. Walter and Greg D. Matthews},
  year = {2012},
  doi = {10.3133/ofr20121209},
  url = {https://pubs.usgs.gov/publication/ofr20121209},
  note = {Source identifier: ofr20121209}
}