TY  - BOOK
AU  - Sanford, David H
AU  - Sanford,David H
TI  - If P, Then Q:  Conditionals and the Foundations of Reasoning
SN  - 0415079942   
U1  - N10 
PY  - 1989///
CY  - London
PB  - Routledge
N1  - includes index and biblioraphy
ER  -