000 00431nam a2200169Ia 4500
008 131223s9999 xx 000 0 und d
040 _aISI KOLKATA
041 _aEnglish
082 _a512.7
_bF866
100 _aFreitag Herta T
245 _aNumber story
260 _aWashington
_bNational Council of Teachers of Mathematics
_c1960
300 _a76p
650 _aNumber theory
700 _aFreitag A H
_4Auth.
942 _cBK
999 _c49181
_d49181