00275nam a2200109Ia 4500008004100000020001800041082001400059100001500073245002700088260004200115300000800157190710s9999    xx            000 0 und d  a81-219-0909-0  a530 Ar67B  aArora, C L 0aB Sc practical physics  aNew delhibS. Chand and Companyc2005  a609