  1972 - Symmetry Groups and Their Applications [Pure and applied mathematics; a series of monographs and textbooks] (Hardcover) ISBN-13: 9780124974609 ISBN-10: 0124974600 ?  Symmetry and Separation of Variables [Encyclopedia of mathematics and its applications ; v. 4 : Section, special functions] (Paperback) ISBN-13: 9780201135039 ISBN-10: 0201135035 Genre: Reference ? |
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