Enderton, Herbert B. <br/><br/>
A mathematical introduction to logic 

 - New York :  Academic Press,  1972 
 - 295 p. 
<br/><br/><label>LCCN: </label>41206 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lógica simbólica y matemática.
<br/><br/><label>Dewey Class. No.: </label>511.3  / E5