000 00301pam a2200121a 44500
082 _a510
_bC383
100 _aCharosh, Mannis
245 1 _aMATHEMATICAL CHALLENGES
260 _aWashington
_bNational Council Of Teachers Of Mathematics
_c1965
300 _a135
964 _gCIRC
997 _a34204 C
999 _c425995
_d425995