@article{88553,
      author = {Billington, Ray Allen,},
      url = {http://library.usi.edu/record/88553},
      title = {The westward movement in the United States.},
      publisher = {Van Nostrand},
      recid = {88553},
      pages = {192 p.},
      address = {Princeton, N.J.,},
      year = {1959},
}