000 00267nam a2200109Ia 4500
100 _aSingh, R p
245 _aChallenges of tomorrow /
_cby R P Singh
260 _aNew Delhi :
_bSterling Publishers ,
_c1993.
300 _a166p. :
650 _aEducation
942 _cGEN
999 _c112897
_d112897