1991 - Ring Theory Student Edition (Hardcover) ISBN-13: 9780125998406 ISBN-10: 0125998406 Genres: Science & Math, Engineering & Transportation, Substores ? 1988 - Ring Theory [Pure and Applied Mathematics Series, Vol 127] (Hardcover) ISBN-13: 9780125998413 ISBN-10: 0125998414 Genre: Science & Math ? |