@misc{indiciae5b776bc12f12,
  title = {Mapping world terrestrial ecosystems - GIS and cartographic approaches},
  author = {Roger Sayre and Madeline T. Martin and Deniz Karagulle and Charlie Frye and Timothy Boucher and Nicholas Wolff},
  url = {https://pubs.usgs.gov/publication/70223862},
  note = {Source identifier: 70223862}
}