@article{172824,
      author = {Porphyry, and Spade, Paul Vincent.},
      url = {http://library.usi.edu/record/172824},
      title = {Five texts on the mediaeval problem of universals :  Porphyry, Boethius, Abelard, Duns Scotus, Ockham /},
      publisher = {Hackett,},
      recid = {172824},
      pages = {xviii, 238 p. ;},
      address = {Indianapolis :},
      year = {1994},
}