@article{490629,
      note = {Includes index.},
      author = {Marcus, Daniel A.,},
      url = {http://library.usi.edu/record/490629},
      title = {Combinatorics a problem oriented approach / [electronic  resource] :},
      publisher = {Mathematical Association of America,},
      recid = {490629},
      pages = {x, 136 p. :},
      address = {Washington, D.C. :},
      year = {1998},
}