@article{56328,
      author = {Rappaport, David.},
      url = {http://library.usi.edu/record/56328},
      title = {Understanding and teaching elementary school mathematics.},
      publisher = {Wiley},
      recid = {56328},
      pages = {ix, 227 p.},
      address = {New York,},
      year = {1966},
}