000 00323nam a2200133Ia 4500
008 211201s2004 xx 000 0 eng d
082 _a375.5
100 _aGUPTA, N.K
245 0 _aRESEARCH IN TEACHING OF SCIENCE
260 _bAPH PUBLICATION
_aNEW DELHI
_c2004
300 _a210
650 _aEducation
942 _2ddc
_cDOE
999 _c4199
_d4199