00247nam a2200109Ia 4500008004100000041001200041082001100053100001600064245004500080260000600125650000600131221030s9999    xx            000 0 und d  aEnglish  a105.23  aO. P. Sinha 0aElctricity and Magnetismcby O. P. Sinha  c0  aB