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This Project Blue Book file, released through The Black Vault, collects US Air Force records from 1950 to 1959 on the movie film Nicholas Mariana shot at Great Falls, Montana on 15 August 1950. It includes the OSI interview report, letters about borrowing and copying the film, and a 1956 Douglas Aircraft analysis. Blue Book's own findings were not consistent: one letter lists the cause as unknown, while later memos conclude the objects were probably two F-94 jets.
Read from the scan by GLM-OCR; expect the odd misread word.
## REFERENCES
(1) The "American Nautical Almanac" 1950.
(2) H.0. No. 214, "Tables of Computed Altitude and Azimuth for Latitudes $ 4 0^{\circ} $ to $ 4 9^{\circ} $ ".
(3) J. Veath, J. G. "200 Miles Up", Ronald Press Company, N. Y. Second Edition, 1955, p. 111.
(4) Kaiser, T. R., "Meteors", Pergamon Press, 1955.
(5) La Paz, L. "Meteoroids, Meteorites, and Hyperbolic Meteor Velocities", Chapt. XIX of the Physics and Medicine of the Upper Atmosphere.
(6) O. C. Farrington. "Meteorites", Chicago, 1915.
(7) "Measurement of Birds", Scientific Publications of the Cleveland Museum of Natural History, Vol. II, 1931.
(8) Kartright, F. H., "The Ducks, Geese and Swans of North America". American Wild Life Institute, 1943.
(9) Headley, F. W. "The Flight of Birds", Witherly and Co. 326 Holborn, London, 1912.
(10) Menzel, D. H., "Flying Saucers", Harvard University Press, 1953.
(11) Mees, C. E. K. "The Theory of the Photographic Process", Revised Edition, MacMillan Co., N.Y., 1954.
(12) Danjon, A., Conder, A. "Lunettes et Telescopes", Paris, 1935.
(13) Kuiper, G. F., "The Atmospheres of the Earth and Planets", University of Chicago Press, 1951.
(14) Ruppelt, E. J., "The Report on Unidentified Flying Objects", Doubleday and Co., 1956. Document, cited by the archive. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 114 pages are in the text index: search them above, or from the library's search.