TY  - BOOK
AU  - Ackermann, Robert John
AU  - Ackermann,Robert John
TI  - Modern Deductive Logic:  Introduction to Its Technicques and Significance
SN  - 0333111389   
U1  - N14 
PY  - 1970///
CY  - New York
PB  - Palgrave
N1  - includes index and biblioraphy
ER  -