Mathematical logic 
Ebbinghaus, Heinz-Dieter, 
 - 2nd ed. 
 - New York :  Springer-Verlag,  1994 
 - x, 289 p. :  ill. ;  25 cm. 
 - Undergraduate texts in mathematics .
<br/><br/><label>ISBN: </label>0387942580 (New York : acid-free paper) | 3540942580 (Berlin : acid-free paper)