000 00271nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aJournal of Research in Science Teaching
260 _aWiley
_bArizona
_c1 Feb-31 May,1992
362 _a29-29
_b02-Apr
942 _2ddc
_cJ
999 _c189952
_d189952