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![Cover for George Bluman · Symmetry and Integration Methods for Differential Equations - Applied Mathematical Sciences (Paperback Book) [Softcover reprint of the original 2nd ed. 2002 edition] (2010)](https://imusic.b-cdn.net/images/item/original/474/9781441931474.jpg?george-bluman-2010-symmetry-and-integration-methods-for-differential-equations-applied-mathematical-sciences-paperback-book&class=scaled&v=1603944460)