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- catalog contributor b9062173.
- catalog contributor b9062174.
- catalog contributor b9062175.
- catalog contributor b9062176.
- catalog created "[1950]".
- catalog date "1950".
- catalog date "[1950]".
- catalog dateCopyrighted "[1950]".
- catalog extent "xii, 121 p. :".
- catalog isPartOf "Report / Civil Aeronautics Administration, Division of Research ; no. 91".
- catalog issued "1950".
- catalog issued "[1950]".
- catalog language "eng".
- catalog publisher "Washington, D.C. : Civil Aeronautics Administration, Division of Research,".
- catalog subject "Air traffic controllers.".
- catalog subject "Aviation.".
- catalog title "Field tryout of a procedure for evaluating the proficiency of air route traffic controllers / by John A. Nagay.".
- catalog type "text".