@article{1387484,
      note = {"A Bradford book."},
      author = {Hatfield, Gary C.},
      url = {http://library.usi.edu/record/1387484},
      title = {The natural and the normative : theories of spatial  perception from Kant to Helmholtz /},
      publisher = {MIT Press,},
      recid = {1387484},
      pages = {1 online resource (xii, 366 pages)},
      address = {Cambridge, Mass. :},
      year = {1990},
}