Grätzer, George A. <br/><br/>
The congruences of a finite lattice:  a proof-by-picture approach/ 
George Grätzer. 
 - Boston;  Basel:  Birkhäuser,  c2006. 
 - xxii, 281 p.:  ill.;  24 cm. 
<br/><br/>Includes bibliographical references (p. [265]-273) and index. 
<br/><br/><label>ISBN: </label>0817632247 
<br/><br/><label>Standard No.: </label>9780817632243 
<br/><br/><label>LCCN: </label>2005934394 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Congruence lattices.<br/>Lattice theory.
<br/><br/><label>Dewey Class. No.: </label>511.33