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by Patrick R. Delaney (Northern Illinois Univ.); O. Ray Whittington (San Diego State Univ.)
by O. Ray Whittington (San Diego State Univ.)
by Whittington, O. Ray
by O. Ray Whittington (DePaul University )
by Patrick R. Delaney (Northern Illinois University); O. Ray Whittington (San Diego State University)
by O. Ray Whittington (San Diego State University); Patrick R. Delaney (Northern Illinois University)