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Verderber, Rudolph F. (Nombre personal)
His The challenge of effective speaking, 1970.
Inter-Act, [2013]: t.p. (Rudolph F. Verderber, University of Cincinnati)
Info. converted from 678, 2012-10-02 (b. 8/7/33)
Speak, ©2012 : t.p. verso (Rudolph F. Verderber)
