TY  - BOOK
AU  - Gratzer,George A.
TI  - The congruences of a finite lattice: a proof-by-picture approach 
SN  - 0817632247
PY  - 2006///
CY  - Boston, Basel
PB  - Birkhäuser
KW  - Congruence lattices
KW  - Lattice theory
N1  - Includes bibliographical references (p. [265]-273) and index
UR  - http://www.loc.gov/catdir/toc/fy0610/2005934394.html
ER  -