000			00343nam a2200157Ia 4500
020			_a9780602575861
040			_c.
082			_bt-255 _a510
100			_aMerrtens, Ruth
245		0	_aAbacus evolve textbook 1 for 6
260			_c0
300			_a80
942			_2ddc _cTB
999			_c706875 _d706875