@article{
  author = {Reyhani, E., Izadi, M.},
  title = {Comparative Content Analysis of Mathematics Textbooks in first Grade Students of Elementary Schools in Iran, Japan and America},
  journal = {International Journal of Industrial Mathematics},
  year = {2018},
  volume = {10},
  number = {3},
  pages = {299-314},
  doi = {}
}