@article{1989,
      author = {Pap, Arthur,},
      url = {http://library.usi.edu/record/1989},
      title = {Semantics and necessary truth.},
      publisher = {Yale University Press,},
      recid = {1989},
      pages = {456 p. ;},
      address = {New Haven,},
      year = {1958},
}