@misc{indiciaee4b3687f7e96,
  title = {Twentieth century demographic changes in cirio and cardón in Baja California, Mexico},
  author = {Stephen H. Bullock and Nora E. Martijena and Robert H. Webb and Raymond M. Turner},
  year = {2004},
  doi = {10.1111/j.1365-2699.2004.01152.x},
  url = {https://pubs.usgs.gov/publication/70029105},
  note = {Source identifier: 70029105}
}