000 00295nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aAmerican Journal of Physics
260 _aNew York
_bAmerican Association of Physics Teachers
_c1 Jul-31 Dec,1990
362 _a58-58
_b07-Dec
942 _2ddc
_cJ
999 _c191290
_d191290