@book{ BA65075563,
  author    = "Ringseis, Franz",
  title     = "Denkerziehung in Grund- und Hauptschule",
  publisher = "Ehrenwirth",
  year      = "1970",
  series    = "Unterricht, Erziehung, Wissenschaft und Praxis",
  number    = "Bd. 22",
  URL       = "http://ci.nii.ac.jp/ncid/BA65075563"
}