TY  - BOOK
AU  - Gratzer George
TI  - Universal algebra
T2  - University Series in Higher Mathematics. Ed by MH Stone etc.19
U1  - B2, K8 
PY  - 1968///
CY  - New Jersey 
PB  - Van Nostrand        
KW  - Algebra
N1  - Bibliography P 330-60
ER  -