000 00282nam a2200121Ia 4500
082 _a530
_bKEI
100 _aKEITH, Bill Mac
245 _aWorld of science: Universe
260 _aNew Delhi
_bS. Chand and Company
_c1999
300 _a124p.
650 _aApplied Sc.
650 _aPhysics
999 _c2595
_d2595