Verderber, Rudolph F. (Personal Name)

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)