http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Introduction to the theory of abstract algebras
Introduction: Set theory -- 1. Basic concepts -- 2. Subdirect decompositions -- 3. Direct decompositions -- 4. Free algebras -- 5. Varieties of algebras.
Athena series : selected topics in mathematics