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- catalog contributor b7420840.
- catalog created "1952.".
- catalog date "1952".
- catalog date "1952.".
- catalog dateCopyrighted "1952.".
- catalog description "Bibliography: ℓ.12.".
- catalog extent "12 ℓ.".
- catalog isPartOf "Technical development report no.180".
- catalog issued "1952".
- catalog issued "1952.".
- catalog language "eng".
- catalog publisher "Indianapolis, Civil Aeronautics Administration, Technical and Development Center,".
- catalog title "A preliminary study of unidentified targets observed on air traffic contraol radars, by R.C. Borden and T.K. Vickers.".
- catalog type "text".