@article{81077,
      author = {Wittgenstein, Ludwig,},
      url = {http://library.usi.edu/record/81077},
      title = {Preliminary studies for the "Philosophical  investigations";},
      publisher = {Harper},
      recid = {81077},
      pages = {xvi, 185 p.},
      address = {New York,},
      year = {1965},
}