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			| T S. Barth
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								 J. W. McCandless, M. K. Kaiser, T. S. Barth, R. S. McCann,  & N. J. Currie (2006) Human-systems integration challenges for constellation, Human Factors and Ergonomics Society 50th Annual Meeting.  San Francisco, CA.  pp 96-100   |  
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								 T. S. Barth, B. L. Beard,  & A. J. Ahumada (1999) Nonlinear features in vernier acuity, In B. E. Rogowitz and T. N. Pappas, eds., Human Vision and Electronic Imaging IV, SPIE Proceedings Vol. 3644, paper 8, 1999   |  |  |  |