TY  - BOOK
AU  - Bettinghaus,Erwin Paul
TI  - Message preparation: the nature of proof
T2  - The Bobbs-Merrill series in speech communication, 1
SN  - Null
AV  - PN4121 .B448
U1  - 840 
PY  - 1966///]
CY  - Indianapolis
PB  - Bobbs-Merrill
KW  - Public speaking
KW  - Belief and doubt
N1  - Bibliography: p. 121-122
ER  -