1981 - Introduction to Perturbation Techniques (Hardcover) ISBN-13: 9780471080336 ISBN-10: 0471080330 Genres: Science & Math, Engineering & Transportation ? 1973 - Perturbation Methods [Pure and Applied Mathematics] (Hardcover) ISBN-13: 9780471630593 ISBN-10: 0471630594 Genre: Science & Math ? Problems in Perturbation (Hardcover) ISBN-13: 9780471822929 ISBN-10: 0471822922 Genre: Science & Math ? |