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by Foltz, Kevin; Simpson, William R.
by Simpson; William R.
by Simpson, William M. R.; Koons, Robert C.; Teh, Nicholas J.
by Weisberger, R. William; Simpson, Chad E.; Hupchick, Dennis T.
by Weeks, Kent R.; Manuelian, Peter Der; Simpson, William Kelly
by Kevin Foltz; William R. Simpson
by Kevin E. Foltz; William R. Simpson; Institute for Defense Analyses
by Simpson, William M. R.; Leonhardt, Ulf
by Simpson, William M. R.
by William R. Simpson