TY  - BOOK
AU  - Hilpinen Risto Ed.
TI  - Deontic logic:  introductory ands systematic readings
SN  - 9027701679
U1  - R1, L1 
PY  - 1971///
CY  - Holland
PB  - D. Reidel Publishing Company    
KW  - PHILOSOPHY
ER  -