000			00422nam a2200145 a 4500
005			20240602103345.0
008			010810s19uu xx 00 eng d
010			_a75-135633
100			_aWolf, Frank L.
245			_aNumber systems and their uses / _cFrank L. Wolf.
260			_aWaltham, Mass. : _bXerox College Publishing, _cc1971.
300			_axiv, 591 p.
650			_aArithmetic _xStudy and teaching.
942			_2ddc
999			_c74493 _d74493