000			00337nam a22001577a 4500
003			OSt
005			20251030160734.0
040			_cNNL
041			_aEng
082			_a372.7 _bN917 2007
245			_aNumbers to 50
260			_aAustralia _bBlake _c2007
300			_a24 p.
650			_aMathematics--Study and teaching
942			_cCS
999			_c126038 _d126038