00281nam a2200121Ia 4500008004100000020001800041082000800059082001000067100001800077245003100095260001100126260002200137230118s9999||||xx |||||||||||||| ||und||  a81-7556-616-7  a530  bSIN/A  adr.s.pbsingh 0aadvanced practical physics  ameerut  bpragati prakashan