@article{120875,
      author = {Cannon, William F. and Klasner, J. S.},
      url = {http://library.usi.edu/record/120875},
      title = {Phosphorite and other apatite-bearing sedimentary rocks in  the Precambrian of northern Michigan /},
      publisher = {U.S. Geological Survey,},
      recid = {120875},
      pages = {6 p. :},
      address = {Arlington, Va. :},
      year = {1976},
}