000			00427nam a2200157Ia 4500
005			20250206160016.0
008			250205s9999||||xx |||||||||||||| ||und||
020			_a0486669025
082			_a515.353 _bPET
100			_aPetrovsky, I. G.
245		0	_aLectures on Partial Differential Equations
260			_aNew York : _bDover Publications, _c1991
300			_ax, 245p.; _c21cm
650			_aDifferential Equations
942			_cLM
999			_c1895 _d1895