@article{723330,
      author = {Zoehfeld, Kathleen Weidner.},
      url = {http://library.usi.edu/record/723330},
      title = {Rocks and minerals /},
      publisher = {National Geographic,},
      abstract = {An introduction to rocks and minerals including how they  are formed.},
      recid = {723330},
      pages = {32 p. :},
      address = {Washington, D.C. :},
      year = {2012},
}