The track of a "Neidentifikovani Leteći Objekat" from an investigation by the Academic Astronautical and Astronomical Club of Jugoslavia. The AAAK determined the object was an observational balloon. From the excellent UFO's From Behind the Iron Curtain by Ion Hobana and Julien Weverbergh, courtesy Bantam Books, 1974.
Ziveli!
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