@article{21507,
      author       = "Seminar - in - Depht 18 - 19 January 1971, El Paso, Texas",
      title        = "Optical Tracking Systems. Seminar - in - Depht 18 - 19
                      January 1971, El Paso, Texas. Sponsored by the SPIE white
                      sands chapter. Seminar proceedings Volume 23  ",
      year         = "1971",
      note         = "1 sv., čet. obr. a foto. v textu",
}