@article{1384499,
      author = {Christensen, Peter, and Sampson, Steven,},
      url = {http://library.usi.edu/record/1384499},
      title = {The decline of Iranshahr : irrigation and environment in  the Middle East, 500 BC-AD 1500 /},
      recid = {1384499},
      pages = {1 online resource (368 pages) :},
}