@article{710049,
      author = {Kahl, Thede. and Dimitrova, Tanya.},
      url = {http://library.usi.edu/record/710049},
      title = {Migration from and towards Bulgaria 1989-2011 [electronic  resource] /},
      recid = {710049},
      pages = {1 online resource (277 pages) :},
}