000 00314nam a2200133Ia 4500
008 190601s9999 xx 000 0 und d
082 _a513
_bDUL
100 _aDurell, C.V.
245 0 _aArithmetic
260 _aLondon
_bG.Bell and Sons.
_c1955
300 _axvi, 369, l p.
650 _aArithmetic
942 _cS
999 _c118925
_d118924