000			00301nam a2200145Ia 4500
008			220421s9999||||xx |||||||||||||| ||und||
020			_c675
040			_aBED
100			_aRao, D B
245		0	_aScience Education
260			_bDPH Pub. _aNew Delhi
300			_a300
500			_a3296
942			_cBK
999			_c3296 _d3296