@article{80063,
      note = {"First edition."},
      author = {Cohen, Morris R. and Nagel, Ernest,},
      url = {http://library.usi.edu/record/80063},
      title = {An introduction to logic and scientific method,},
      publisher = {Harcourt, Brace and company},
      recid = {80063},
      pages = {xii, 467 p.},
      address = {New York,},
      year = {1934},
}