@article{1362219,
      author = {Enger, Sandra K., and Yager, Robert Eugene,},
      url = {http://library.usi.edu/record/1362219},
      title = {Assessing student understanding in science : a  standards-based K-12 handbook /},
      recid = {1362219},
      pages = {1 online resource (212 pages) :},
}