@article{713607,
      author = {Woodworth, Steven E. and Grear, Charles D.,},
      url = {http://library.usi.edu/record/713607},
      title = {The Vicksburg Campaign, March 29-May 18, 1863 [electronic  resource] /},
      recid = {713607},
      pages = {1 online resource (268 pages) :},
}