00365nam a2200133Ia 4500008004100000041000800041084001000049100002400059245004500083260004000128490003400168546001700202653001200219160807s1976    xx            000 0 mal d  amal  aC2CC  aSantha Kumar, C. G.  aMeghanadaa saha /cby C. G. Santha Kumar  aThiruvananthapuram :bSteps,c1976.  aChildren's Science Libraryv3  aIn Malayalam  aPhysics