@article{468503,
      author = {Brown, Nancy Marie.},
      url = {http://library.usi.edu/record/468503},
      title = {The abacus and the cross the story of the Pope who brought  the light of science to the Dark Ages / [electronic  resource] :},
      publisher = {Basic Books,},
      recid = {468503},
      pages = {vii, 310 p. :},
      address = {New York :},
      year = {2010},
}