@book{ BA11908235,
  author    = "Nervo, Amado and Oyuela, Calixto",
  title     = "Elevación",
  publisher = "Espasa-Calpe",
  year      = "1973",
  edition   = "8. ed",
  series    = "Colección Austral",
  number    = "violeta, no. 311",
  URL       = "http://ci.nii.ac.jp/ncid/BA11908235"
}