Seiffert, Helmut <br/><br/>
Introduccion a la logica 
Helmut Seiffert; traducción de Diorki. 
 - Barcelona  Herder  1977. 
 - 282 p. 
<br/><br/> Translated from Einfuhrung in die Logik. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic<br/>Logic, Symbolic and mathematical
<br/><br/><label>LC Class. No.: </label>BC114  / .S458