@article{416924,
      recid = {416924},
      author = {Hassan, Fekri A.},
      title = {Droughts, food, and culture ecological change and food  security in Africa's later prehistory / [electronic  resource] :},
      publisher = {Kluwer Academic/Plenum Publishers,},
      address = {New York :},
      pages = {xvii, 347 p. :},
      year = {2002},
      url = {http://library.usi.edu/record/416924},
}