000			00375nam a2200181Ia 4500
008			240220s9999 xx 000 0 und d
041			_aENG
082			_a"624,1"
100			_aGupta R. B.
245		0	_aNatural science
260			_aNULL
260			_bSatya Prakashan.
260			_c1994
300			_a234p.
365			_b90
650			_aMECHANICAL
942			_cDBK
999			_c24391 _d24391