000 00289nam a2200109Ia 4500
008 220421s1998 xx 000 0 und d
041 _aeng
082 _a507
_bSIN/TEA
100 _aSingh U.K.
_9571017
245 _aTeaching Of Science.
260 _aDelhi
_b Vanity Books International
_c1998
999 _c397157
_d397157