000 00288nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aMathematics Teacher
260 _aNational Council of Teachers of Mathematics
_bReston
_c1 Jan-31 May,1990
362 _a83-83
_b01-May
942 _2ddc
_cJ
999 _c189540
_d189540