TY  - BOOK
AU  - Gratzer, George
AU  - Chern S S [series editor]
AU  - Nirenberg, L  [series editor]
TI  - Universal algebra
U1  - 512.89 
PY  - 1968///
CY  - Princeton
PB  - D. Van Nostrand
KW  - Algebra, partial
KW  - Algebras, free
KW  - Homomorphisms
ER  -