000			003530000a22001330004500
245			_aSeeing through mathematics
100			_aEngen, Henry Van [et al.]
260			_aIllinois _bScott Foresman _c1967
300			_a3 v.
500			_a010175-v.1, 010176-v.2, 010177-v.3 (508 p.; 528 p.; 539 p.)
080			_a51(075) _bS4
041			_aEN
942			_cBK
999			_c95416 _d95416