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020			_a970-10-5381-8
041			_aESPAÑOL
082			_a _b
100			_aSAMUELSON,PAUL ANTHONY
245		0	_aECONOMIA _b
260			_aMEXICO _bMC GRAW-HILL _c2006
942			_cBK
999			_c39875 _d39875