000 00274nam a2200121Ia 4500
100 _aPeriodical
942 _cBK
245 _aIndian Educational material
260 _aNew Delhi
_bInd Nat Sci Doc Cen.
_c1969
082 _a16.37
_bIEM
300 _a6,361
546 _aEnglish
999 _c340430
_d340430
041 _aeng