@article{849501,
      author = {Dainard, J. A., and Orsoni, Jean, and Smith, David, and  Allan, Peter, and Helvetius, Madame,},
      url = {http://library.usi.edu/record/849501},
      title = {Correspondance générale d'Helvétius., Volume II,:  1757-1760, lettres 250-464 /},
      recid = {849501},
      pages = {1 online resource (455 pages) :},
}