@article{53704,
      note = {Half title: Newton's Principia.},
      author = {Newton, Isaac,},
      url = {http://library.usi.edu/record/53704},
      title = {Mathematical principles of natural philosophy ...},
      publisher = {Greenwood Press},
      recid = {53704},
      pages = {2 v. (xxxiii, 680 p.)},
      address = {New York,},
      year = {1969},
}