http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1. Numbers -- 2. Functions -- 3. Equivalence -- 4. Groups and monoids -- 5. Homomorphisms -- 6. Rings -- 7. Fields -- 8. Factorization -- 9. Modules -- 10. Group actions -- 11. Quasigroups.
Smith, Jonathan D.H. Introduction to Abstract Algebra, Second Edition
Textbooks in mathematics (Boca Raton, Fla.)