Alchourron,Carlos E <br/><br/>
Normative systems 
Carolos E.Alchourron and Eugenio Bulygin 
 - Wien  Springer-Verlag.  1971 
 - xviii ,208p.; 23cm-.  
 - Library of exact philospophy; no.5 .
<br/><br/><label>Dewey Class. No.: </label>172.2  /  ALC