@article{419498,
      url = {http://library.usi.edu/record/419498},
      title = {Oral contraceptives & breast cancer [electronic  resource] /},
      publisher = {National Academy Press,},
      recid = {419498},
      pages = {x, 185 p. :},
      address = {Washington, D.C. :},
      year = {1991},
}