TY  - BOOK
AU  - Belnap,Nuel D.
AU  - Steel,Thomas B.
TI  - The logic of questions and answers
SN  - 0-300-01962-9
AV  - REF BC199.Q4B44 
PY  - 1976///
CY  - New Haven
PB  - Yale University
KW  - Question (logic)
KW  - Question answering systems
N1  - Bibliography:p.155-200 and index
ER  -