CIA File of the Day
Hypothesis About Flying Plates (Hypothesis About Unidentified Flying Objects)
A CIA abstract of an article by N. Mardzhanishvili titled "Hypothesis about flying plates," originally noted as published in Leninskaya smena, no. 22, 31 January 1968. The abstract says the article reviews various British, Russian, Yugoslav, and U.S. eyewitness accounts of UFOs, quotes the West German experimenter Professor H. Oberth, and notes that a worldwide conference on UFOs would be held in Vienna in August 1958.
Courtesy of the CIA FOIA Electronic Reading Room. Official page: CIA FOIA Electronic Reading Room. Document PDF: cia.gov reading room PDF. Copy: Internet Archive.