@article{18534,
      recid = {18534},
      author = {Ruchlis, Hyman.},
      title = {Math projects: mathematical shapes,},
      publisher = {Book-Lab,},
      address = {Brooklyn, New York,},
      pages = {48 p. :},
      year = {1968},
      url = {http://library.usi.edu/record/18534},
}