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Mark DeRuiter and Virginia Ramachandran
Mark DeRuiter and Virginia Ramachandran
Durrant, Fowler, Ferraro, and Purdy
Tony L. Sahley, Frank E. Musiek
Jerry L. Cranford, Ph.D., M.C.D., C.C.C.-A.
Studies at the Research Triangle Institute
James Jerger, Carol A. Silverman
Christy L. Ludlow, Ph.D. & Raymond D. Kent, Ph.D.
Elizabeth B. Cole, Carol Flexer