TY  - BOOK
AU  - Anderson Alan Ross
AU  -  Belnap Nuel D
TI  - Entailment : the logic of revevance and necessity
U1  - R14:(B), L5 
PY  - 1975///
CY  - London
PB  - Princeton U.K.      
KW  - PHILOSOPHY
N1  - Biblio p 493-516
ER  -