@article{172268,
      recid = {172268},
      author = {Newton, Edward R.},
      title = {Medical problems in pregnancy /},
      publisher = {Saunders,},
      address = {Philadelphia :},
      pages = {x, p. 517-752 :},
      year = {1989},
      url = {http://library.usi.edu/record/172268},
}