Hilpinen, Risto <br/><br/>
Deontic logic :  Introductory and systematic readings 

 - Dordrecht :  Reidel,  1971 
 - vi, 182p.,1.h.;  23 cm. 
 - Synthese library .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lógica matemática
<br/><br/><label>Universal Decimal Class. No.: </label>164