000			00435nam a22001457a 4500
003			OSt
005			20220912122740.0
008			220912b ||||| |||| 00| 0 eng d
100			_a निगम डी . एस ., Nigam D .S .
245			_aविज्ञान शिक्षण , Teaching of Science
260			_aChandigarh _bHaryana Sahitya Akademi
300			_aPage No.438 _bHB
650			_2India Science
942			_2ddc _cBK
999			_c2004 _d2004