000			00312nam a2200133Ia 4500
100			_aSCHECHTER R S
650			_aThe variational method
365			_cRS
365			_d1
942			_cDENGBK
245			_aThe variational method in engineering
260			_bMc-Graw Hill Company _c1967 _aNew York
300			_a287P
999			_c26424 _d26424