Gratzer, George A. <br/><br/>
Universal algebra / 
George Gratzer. 
 - 2d ed. 
 - New York :  Springer-Verlag,  1979. 
 - xviii, 581 p. :  ill. ;  24 cm. 
 - 512 .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 475-563. 
<br/><br/><label>ISBN: </label>0-387-90355-0 3-540-90355-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra, Universal.
<br/><br/><label>Dewey Class. No.: </label>512