@misc{24162,
  pages      = {8},
  title      = {Pasos de cálculo para preparatorio},
  year       = {1967},
  country    = {Ecuador [EC]},
  lgcode     = {Spanish [spa]},
  macro_area = {Eurasia},
  sil_id     = {13272},
  src        = {sil16},
  subject    = {Arithmetic [Zarth]}
}