000			00280nam a2200133Ia 4500
100			_aInternational Coresponcence School
250			_a5th ed
654			_aMaths.
942			_cBK
245			_aGraphs
260			_aauth., London _cc1957
082			_a511.5 I.C.S.
300			_a48p
999			_c26372 _d26372