000			00405nam a2200145Ia 4500
008			180612s9999||||xx |||||||||||||| ||und||
020			_a0-521-49703-5
041			_aen
082			_a530.15'535
100			_aHYDON, Peter E.
245		0	_aSymmetry methods for differential Equations : A Bigginer's Guide.
260			_aCambridge. _bCambridge University press. _c2000
300			_axi, 213p.
942			_cPR
999			_c58940 _d58940