@article{1363775,
      author = {Posamentier, Alfred S. and Krulik, Stephen.},
      url = {http://library.usi.edu/record/1363775},
      title = {Problem solving in mathematics, grades 3-6: powerful  strategies to deepen understanding /},
      publisher = {Corwin,},
      recid = {1363775},
      pages = {xii, 134 p. :},
      address = {Thousand Oaks, Calif. :},
      year = {2009},
}