000 00271nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aJournal of Research in Science Teaching
260 _aWiley
_bArizona
_c1 Jul-31 Dec,1993
362 _a30-30
_b06-Oct
942 _2ddc
_cJ
999 _c190147
_d190147