@article{928359,
      author = {Yetman, David, and Búrquez Montijo, Alberto, and Hultine,  Kevin, and Sanderson, Michael J., and Crosswhite, Frank  S.,},
      url = {http://library.usi.edu/record/928359},
      title = {The saguaro cactus : a natural history /},
      recid = {928359},
      pages = {1 online resource.},
}