@article{558,
      recid = {558},
      author = {Edwards, Lyford P.},
      title = {The natural history of revolution},
      publisher = {University of Chicago Press},
      address = {Chicago,},
      pages = {xxi, 229 p.},
      year = {1970},
      note = {Reprint of the 1927 ed. with a new foreword by Morris  Janowitz.},
      url = {http://library.usi.edu/record/558},
}