TY  - BOOK
AU  - Gratzer, George
TI  - Lattice theory: : first concepts and distributive lattices
SN  - 9780486471730
U1  - 512.56 
PY  - 2009///
CY  - Mineola
PB  - Dover
KW  - MATHEMATICS- ALGEBRA
KW  - LATTICE THEORY
ER  -