00319nam a2200109Ia 4500008004100000041001200041082002000053100002000073245007200093260003300165300001100198231217s9999    xx            000 0 und d  aEnglish  a537.5  BOA;1  R  aBoast, Warren B 0aVector fields : a vector foundation of electric and magnetic fields  c1948bHarper & RawaNew York  axx+620