References
- BAILEY , A. W. , and SWEENEY , J. S. , 1955 , Preliminary study of helicopter attitude display systems . NRL Memo. Report 451, March .
- BIRMINGHAM , H. P. , and TAYLOR , F. V. , 1954 , A human engineering approach to the design of man-operated continuous control systems . NRL Report 4333, 7 April .
- SWEENEY , J. S. , BAILEY , A. W. , and DOWD , J. F. , 1954 , Comparative evaluation of three approaches to helicopter instrumentation for hovering flight . NRL Report 4954 .