000			003290000a22001210004500
080			_a531 _bB4
100			_aBecker, Robert A.
245			_aIntroduction to theretical mechanics
260			_aNew York _bMcGraw-Hill _c1954
440			_aInternational series in pure and applied physics
300			_axiii, 420p. : ill.
942			_cBK
999			_c51808 _d51808