@article{17519,
      note = {Reprint of the ed. published by Wiley, New York.},
      author = {Levens, A. S.},
      url = {http://library.usi.edu/record/17519},
      title = {Graphical methods in research /},
      publisher = {R. E. Krieger,},
      recid = {17519},
      pages = {ix, 245 p. :},
      address = {Huntington, N.Y. :},
      year = {1975},
}