@article{742901,
      recid = {742901},
      author = {Pratt, Harold. and Bybee, Rodger W.},
      title = {The NSTA reader's guide to a framework for K-12 science  education practices, crosscutting concepts, and core ideas  / [electronic resource] :},
      pages = {1 online resource (77 pages) :},
      url = {http://library.usi.edu/record/742901},
}