@article{221680,
      recid = {221680},
      author = {Duncan, David Ewing.},
      title = {Calendar : humanity's epic struggle to determine a true  and accurate year /},
      publisher = {Bard,},
      address = {New York :},
      pages = {xv, 266 p. :},
      year = {1998},
      note = {"An Avon book."},
      url = {http://library.usi.edu/record/221680},
}