@article{931230,
      author = {Thompson, Jessica and Houseal, Ana K., and Cook, Abigail  M., and Chen, Milton,},
      url = {http://library.usi.edu/record/931230},
      title = {America's largest classroom : what we learn from our  national parks /},
      recid = {931230},
      pages = {1 online resource (xxi, 284 pages)},
}