@article{1207,
      author       = "Perlado, J. P. and XIIth Congress of the International
                      Society of Photogrammetry in Ottawa 1972",
      title        = "An Aerial Thermography Survey of the Canary Islands  ",
      year         = "1972",
      note         = "1 sv., obr., foto. a tab. v textu",
}