Message preparation :
Bettinghaus, erwin P, 1930-
Message preparation : the nature of proof / Erwin P. ettinghau. - Indianapolic : Bobbs-Merrill, 1966. - viii, 127 p. : illus. ; 21 cm. - The Bobbs-Merrill series in speech communication ,1 .
Includes bibliography.
Open.
6617583
Public speaking.
Belief and doubt.
Message preparation : the nature of proof / Erwin P. ettinghau. - Indianapolic : Bobbs-Merrill, 1966. - viii, 127 p. : illus. ; 21 cm. - The Bobbs-Merrill series in speech communication ,1 .
Includes bibliography.
Open.
6617583
Public speaking.
Belief and doubt.